synergy

synergy · 72

Alcohol Metabolism Fructose Metabolismstrong · 2 cited
Alcohol + fructose both converge on hepatic acetyl-CoA → DNL. Ethanol's NADH surplus stacks with fructose's KHK-driven ATP collapse — NAFLD risk multiplies, not adds.
Calcium Magnesiumstrong · 2 cited
Calcium contracts muscle; magnesium relaxes it. Both needed in balance.
Calcium Kidney Stonesstrong · 3 cited
Counterintuitive: high *dietary* calcium (800-1200 mg/d) binds oxalate in the gut → oxalate absorption ↓ → calcium-oxalate stone risk ↓ 35-50% (Curhan 1993/1997). But high *supplemental* calcium taken without food raises risk. The distinction: food-calcium-with-meals.
Choline TMG / Betainestrong · 2 cited
Choline and betaine are two ends of one methyl ledger. In the liver choline is oxidised to betaine (a one-way step — there's no route back), and betaine hands over its methyl to turn homocysteine back into methionine. Run the other way: short on choline, the liver takes the backup line (PEMT) and builds choline-containing phospholipid itself — burning three methyls per molecule. So 'not eating enough choline' and 'methylation is under strain' are two descriptions of the same thing in the liver.
Creatine Beta-Alaninestrong · 2 cited
ISSN position stand pre-workout stack: creatine raises ATP capacity, beta-alanine (→carnosine) buffers lactic H+. Combination > either alone; best for HIIT + resistance. Avoid co-ingesting with high-dose caffeine in the same window.
Digestive Immunestrong · 2 cited
~70% of immune cells reside in the gut (Peyer's patches/GALT); barrier leakiness → bacterial translocation → systemic inflammation. 'Gut as immune training ground' is literal.
Fat Types Fats & Omega-3strong · 2 cited
Same molecular framework (chain length × double bonds). Linking them lets readers walk fat-types → omega-3 deep dive as one continent, not two islands.
Glycogen supercompensation Carbs & Fiberstrong · 2 cited
GLUT4 is the door glucose uses to enter the fibre; glycogen synthase is the step that builds the same sugar past the everyday fill line. An open door only explains entry. Supercompensation is synthase still on after the tank was emptied.
Gut during exercise Water & Electrolytesstrong · 1 cited
When plasma volume falls, the splanchnic bed is clamped; intensity itself also moves cardiac output off the gut toward muscle and skin. The two lines can stack. They are not the same line.
Hypertrophy mechanisms Proteinstrong · 2 cited
mTORC1 activation requires both leucine threshold (~2.5 g) and mechanical signaling. Training + protein are the minimum sufficient conditions for hypertrophy; either alone collapses the other's value.
Hypertrophy mechanisms Creatinestrong · 1 cited
Phosphocreatine pools determine final reps of high-intensity sets, indirectly supporting mechanical-tension accumulation. 3-5 g/day creatine monohydrate is the most evidence-backed training supplement.
Hyperuricemia Endocrinestrong · 2 cited
High urate and the metabolic-syndrome cluster (glucose, lipids, blood pressure, central adiposity, fatty liver) are mutual risks that reinforce each other, and the mechanism runs both ways rather than one causing the other.
IBD Ironstrong · 1 cited
ESPEN keeps oral iron first-line only when clinically inactive; when active or haemoglobin is under 100 g/L, first-line is intravenous. Forcing oral iron in a flare leaves unabsorbed iron in an inflamed lumen.
Kidney Stones Hypertensionstrong · 2 cited
One diet doing two jobs: bring sodium down and urinary calcium follows (the same path by which DASH lowers blood pressure), plus the citrate that fruit and vegetables bring — which makes DASH read almost like a stone-prevention protocol.
L-Tyrosine Nervousstrong · 2 cited
Tyrosine shares the LAT1 door into the brain with BCAA and tryptophan; hydroxylase is near saturation at rest, so extra tyrosine at the door only refills catecholamines while they are being spent.
Muscle Bonestrong · 1 cited
Muscle pull is the mechanical signal for bone remodeling — sarcopenia and osteoporosis co-occur in aging (osteosarcopenia). Resistance training targets both simultaneously.
Niacin Riboflavinstrong · 2 cited
NADH and FADH₂ feed the ETC at two entry points — B3 and B2 are the chain's twin inputs.
Osteoporosis Sarcopeniastrong · 2 cited
Older people should eat less protein is a mistaken cultural expectation, and it damages two things at once: bone matrix and muscle. Bone density and muscle mass decline together and jointly set fall risk, so they are managed together.
Periodontium Digestivestrong · 1 cited
The gingival sulcus is another niche held by neutrophils; once a keystone pathogen turns the guard, leaked inflammation becomes food — the same class of loop as a gut community feeding on inflammation.
Phosphorus Calciumstrong · 2 cited
Bone mineral is calcium phosphate; bone health is not calcium alone.
Recovery science Insomniastrong · 1 cited
Bidirectional: training improves sleep (Kredlow 2015 latency ↓13 min); sleep improves training adaptation (Mah 2011 Stanford basketball). Without sleep, training effects run at 50-70%.
Resistance training basics Musclestrong · 1 cited
Compound lifts drive both mechanical tension and neural recruitment simultaneously across multi-joint chains — the origin of whole-body training adaptation.
Skin & Hair Immunestrong · 2 cited
Skin-resident Langerhans cells + skin microbiome are front-line innate immunity sentinels; atopic dermatitis is barrier failure + Th2 immune skew combined.
Type 2 Diabetes PCOSstrong · 2 cited
Sex-hormone imbalance amplifies insulin resistance: higher androgens in PCOS worsen it, while resistance itself lowers SHBG and pushes free androgen up — a loop that turns on its own, which is why both sides need managing together.
Urolithin A Gut Microbiomestrong · 1 cited
Ellagitannins become urolithin A only through some gut microbes; without that community, pomegranate does not make the molecule.
Vitamin D Vitamin K2strong · 2 cited
D imports calcium; K2 routes it to bone, not arteries.
Vitamin E Seleniumstrong · 2 cited
GPx (a selenoenzyme) clears H₂O₂ in cytosol; α-tocopherol halts lipid peroxidation in membranes. Two phases, one ROS strategy.
VO2max Heartstrong · 1 cited
Cardiac output + O₂ transport + muscle extraction determine VO2max. Mandsager 2018 JAMA Open: high VO2max → all-cause mortality ↓5×, larger than any single CV intervention's effect.
Zone 2 training Heartstrong · 1 cited
Long-term Zone 2 → mitochondrial biogenesis + capillary density + endothelial NO. The deepest cardiovascular adaptations come from low-intensity volume, not short high-intensity bursts.
Choline Folatemoderate · 2 cited
Choline supplies the BHMT remethylation backup to MTR (B12/folate). Low folate raises choline demand.
Coenzyme Q10 Heartmoderate · 2 cited
Q-SYMBIO (Mortensen 2014, N=420, chronic HF) CoQ10 100 mg × 3/d × 2 yr halved all-cause and CV mortality. Statin therapy depletes endogenous CoQ10, plausibly contributing to myalgia (Banach 2015 meta: 100-200 mg/d reduces statin-associated myalgia).
Coenzyme Q10 Migrainemoderate · 1 cited
Sandor 2005 double-blind RCT (N=42) CoQ10 100 mg × 3/d × 3 mo cut migraine days ~50%; AHS 2012 lists it as Level B prevention. Slow onset (4-12 wk); together with Mg + B2 + fish oil forms atlas's 'nutritional quad' for migraine prophylaxis.
Creatine HMBmoderate · 2 cited
Sarcopenia + elderly combo: creatine increases anabolism; HMB suppresses catabolism. Stronger evidence in acute-illness, bedridden, or chronic-disease low-muscle elderly (Deutz, Bear). Marginal in healthy young.
Curcumin Fats & Omega-3moderate · 1 cited
Anti-inflammatory stack: curcumin (NF-κB / COX-2 inhibition) + EPA/DHA → pro-resolving eicosanoids (resolvins, protectins). Moderate combined evidence in chronic inflammation (RA, IBD, NAFLD); weak monotherapy.
Depression & Anxiety Fats & Omega-3moderate · 2 cited
Mocking 2016 Translational Psych meta (N=1233, 13 RCT): EPA ≥60% of total omega-3 at ≥1 g/d × 8-12 wk as SSRI augmentation → MDD remission + small-to-moderate improvement (SMD 0.40). SMILES 2017 Mediterranean diet includes ≥2 fish meals/wk.
Dyslipidemia Chronic Inflammationmoderate · 2 cited
ApoB particles entering the arterial wall is only the start; the inflammation that follows is what drives a plaque toward rupture, and part of the statin benefit is plaque stabilisation.
Elderly resistance training Vitamin Dmoderate · 2 cited
Bischoff-Ferrari 2019: RT + adequate vitamin D doubles strength gains vs RT alone. VDR is expressed in skeletal muscle and modulates protein synthesis.
Elderly resistance training Bonemoderate · 2 cited
Elderly RT triggers muscle-pull mechanostat → bone remodeling → BMD ↑. Liu 2009 Cochrane: high-intensity RT in 90+ reverses sarcopenia + improves bone markers.
Eyes · Myopia · Screens Morning Light & Circadianmoderate · 2 cited
One dose of outdoor light does two jobs: it slows axial elongation of the eye (time outdoors is the strongest-evidence myopia lever we have) and it resets the circadian clock through retinal ipRGCs. Sending a child outside buys both.
Fats & Omega-3 Vitamin Emoderate · 2 cited
Highly polyunsaturated fats (EPA/DHA) oxidize more readily — membrane α-tocopherol demand rises with fish-oil intake.
Fats & Omega-3 Heartmoderate · 3 cited
High-dose EPA (4g/d icosapent ethyl) in REDUCE-IT (N=8,179) cut major CV events 25%; standard fish-oil dose (1g/d EPA+DHA) showed modest/null effects in VITAL / ASCEND. Dose, form, and patient stratification matter.
Fish Oil Heartmoderate · 1 cited
Fish-oil clinical benefit depends entirely on actual EPA+DHA dose and baseline TG. The 'fish oil protects the heart' claim is marketing oversimplification; the strongest evidence is for icosapent ethyl in high-TG + high-CV-risk patients.
Fish Oil Vitamin Dmoderate · 2 cited
The VITAL trial design itself was omega-3 + D co-intervention; overall depression/immune/CV hard endpoints null, but subgroup + exploratory analyses showed signal in low-baseline populations. Clinical: not 'supplement everyone' — combine only when correcting documented deficiency.
Fluoride Calciummoderate · 2 cited
Fluoride supports enamel remineralization alongside calcium-phosphate mineral.
Folate TMG / Betainemoderate · 2 cited
There are two routes back from homocysteine to methionine: one runs on folate and B12, the other has TMG (betaine) hand over a methyl directly. Under methylation strain they run in parallel — neither replaces the other.
GERD Sleep Apneamoderate · 2 cited
The two feed each other: the negative intrathoracic pressure of a breathing event pulls stomach contents up, and nocturnal reflux fragments sleep in turn. Treating both together beats treating either alone.
IBS Probioticsmoderate · 2 cited
Ford 2018 AGA meta: strain-specific — Lacto + Bifido blends help IBS-M/IBS-D global symptoms at B-tier evidence; 'broad-spectrum' is mostly a category error.
Insomnia Magnesiummoderate · 2 cited
Mg²⁺ plugs NMDA receptors and boosts GABA-A — insomnia + anxiety + cramps form a classic Mg-deficient triad.
Insomnia Glycinemoderate · 2 cited
Yamadera 2007 RCT: 3 g glycine pre-bed improved PSG metrics and morning freshness via peripheral vasodilation + core-temp drop.
Iron Vitamin Cmoderate · 1 cited
Reverse of C → Fe; classic same-meal pairing for plant-iron uptake.
Iron Folatemoderate · 2 cited
Both are required inputs to red-cell production, but their deficiencies pull opposite ways: iron shortage makes cells small, folate/B12 shortage stalls DNA synthesis and makes them large. Lack both and MCV lands back in the 'normal' band, hiding both problems at once.
L-Citrulline Beta-Alaninemoderate · 2 cited
Pre-workout pair: citrulline → NO → blood flow ↑; beta-alanine → carnosine → H+ buffering. Different mechanisms, same window — combined effect strongest in multi-joint high-rep resistance.
L-Theanine Caffeine + L-Theaninemoderate · 3 cited
Theanine's most solid evidence line is not focus on its own but changing what caffeine feels like: 100 mg theanine with 50 mg caffeine — the 1:2 protocol — beats either alone on attention-switching and accuracy while damping the jitter caffeine brings.
Liver Kidneymoderate · 2 cited
Drug metabolism: liver Phase I/II metabolites are mostly renally excreted. Hepatic or renal impairment burdens the other — combined pharmacokinetics is the core risk in polypharmacy.
Lutein + Zeaxanthin Astaxanthinmoderate · 1 cited
Complementary carotenoid distribution: lutein + zeaxanthin concentrate at the macula center; astaxanthin populates retinal periphery + scavenges ROS. Long screen / eye strain / age-related AMD prevention — three-component stack is the rational combination.
Magnesium Migrainemoderate · 1 cited
Peikert 1996 Cephalalgia (N=81) Mg citrate 600 mg/d × 12 wk cut migraine frequency 41.6% (placebo 15.8%). Mechanism: NMDA antagonism + cerebrovascular smooth muscle relaxation + raised CSD threshold. AHS 2012 Level B prevention.
Melatonin Glycinemoderate · 1 cited
Sleep dual signal: melatonin = 'it's night' (SCN phase); glycine drops core body temp via peripheral vasodilation + modulates NMDA → reduces anxiety. Low-dose melatonin (0.3-0.5 mg) + 3 g glycine pre-bed is a low-cost complementary stack.
Muscle Nervousmoderate · 1 cited
Exercise-induced muscle releases BDNF + irisin → enters blood → crosses BBB or acts at periventricular regions → neuroplasticity + cognition + antidepressant effect. The molecular basis of 'exercise is the best antidepressant.'
Potassium & Sodium Magnesiummoderate · 2 cited
Potassium/sodium shape membrane potential and fluids; magnesium supports ATP and relaxation.
Potassium & Sodium Calciummoderate · 2 cited
High K (especially K-citrate) reduces urinary calcium loss → indirect bone protection; the DASH-bone overlap. Opposite to high-sodium calciuresis — K offsets Na's bone tax.
Protein Carbs & Fibermoderate · 2 cited
Post-exercise GLUT4 + Leu-mTORC1 share the insulin/AMPK window: glycogen reload + MPS run together (30-90 min). Protein + adequate carb beats protein alone for recovery.
Protein Zincmoderate · 3 cited
Animal protein prises zinc out of phytate's grip in the gut lumen, so the plant-source zinc in the same meal absorbs better too — that's the other half of why vegans need more zinc.
Riboflavin Ironmoderate · 2 cited
B2 (as FAD) cofactors the ferroportin/hephaestin oxidation step that releases dietary iron into blood. B2 deficiency worsens iron-deficiency anemia; combined repletion outperforms iron alone in B2-deficient populations.
TMG / Betaine Vitamin B12moderate · 2 cited
TMG fuels the BHMT backup; when MTR is limited by B12 / folate / MTHFR, betaine carries Hcy back to methionine.
Training injuries Collagen peptidesmoderate · 1 cited
Shaw 2017: 15 g collagen peptides + 50 mg vitamin C 30-60 min pre-training → tendon collagen synthesis ↑. Useful in tendinopathy rehab.
Ultra-processed Foods Sweetenersmoderate · 2 cited
UPF 'zero-sugar' reformulations are the main delivery vehicle for aspartame / sucralose / erythritol. Hall 2019 RCT + WHO 2023 both show: cutting sugar ≠ cutting total intake — UPF whole-design is the lever.
Vitamin B6 Vitamin B12moderate · 1 cited
B12 + folate run remethylation; B6 routes Hcy to transsulfuration. Any one short and Hcy rises.
Vitamin C Vitamin Emoderate · 1 cited
C (aqueous) and E (lipid) work together; C recycles oxidized E.
Zinc Vitamin Cmoderate · 1 cited
Zinc + vitamin C team up on wound healing and immune function.
Magnesium Vitamin B12weak · 1 cited
Magnesium participates in several B12-dependent methylation steps.
Niacin Chromiumweak · 2 cited
Historical 'glucose tolerance factor' (GTF) paired Cr with niacin in 70s-80s marketing. EFSA 2014 + purified LMWCr studies revoked Cr's essential-nutrient status. Kept as a historical edge for context — not a clinical recommendation.
α-GPC + CDP-choline Caffeine + L-Theanineweak · 2 cited
Among the nootropic shelf, one of the few combinations with real synergy evidence is caffeine plus L-theanine — not stacking cholines on top. Before combining, ask what you are actually short of: attention suppressed by adenosine, or acetylcholine.

synergy · 72

Alcohol Metabolism Fructose Metabolismstrong · 2 cited

Alcohol + fructose both converge on hepatic acetyl-CoA → DNL. Ethanol's NADH surplus stacks with fructose's KHK-driven ATP collapse — NAFLD risk multiplies, not adds.

Calcium Magnesiumstrong · 2 cited

Calcium contracts muscle; magnesium relaxes it. Both needed in balance.

Calcium Kidney Stonesstrong · 3 cited

Counterintuitive: high *dietary* calcium (800-1200 mg/d) binds oxalate in the gut → oxalate absorption ↓ → calcium-oxalate stone risk ↓ 35-50% (Curhan 1993/1997). But high *supplemental* calcium taken without food raises risk. The distinction: food-calcium-with-meals.

Choline TMG / Betainestrong · 2 cited

Choline and betaine are two ends of one methyl ledger. In the liver choline is oxidised to betaine (a one-way step — there's no route back), and betaine hands over its methyl to turn homocysteine back into methionine. Run the other way: short on choline, the liver takes the backup line (PEMT) and builds choline-containing phospholipid itself — burning three methyls per molecule. So 'not eating enough choline' and 'methylation is under strain' are two descriptions of the same thing in the liver.

Creatine Beta-Alaninestrong · 2 cited

ISSN position stand pre-workout stack: creatine raises ATP capacity, beta-alanine (→carnosine) buffers lactic H+. Combination > either alone; best for HIIT + resistance. Avoid co-ingesting with high-dose caffeine in the same window.

Digestive Immunestrong · 2 cited

~70% of immune cells reside in the gut (Peyer's patches/GALT); barrier leakiness → bacterial translocation → systemic inflammation. 'Gut as immune training ground' is literal.

Fat Types Fats & Omega-3strong · 2 cited

Same molecular framework (chain length × double bonds). Linking them lets readers walk fat-types → omega-3 deep dive as one continent, not two islands.

Glycogen supercompensation Carbs & Fiberstrong · 2 cited

GLUT4 is the door glucose uses to enter the fibre; glycogen synthase is the step that builds the same sugar past the everyday fill line. An open door only explains entry. Supercompensation is synthase still on after the tank was emptied.

Gut during exercise Water & Electrolytesstrong · 1 cited

When plasma volume falls, the splanchnic bed is clamped; intensity itself also moves cardiac output off the gut toward muscle and skin. The two lines can stack. They are not the same line.

Hypertrophy mechanisms Proteinstrong · 2 cited

mTORC1 activation requires both leucine threshold (~2.5 g) and mechanical signaling. Training + protein are the minimum sufficient conditions for hypertrophy; either alone collapses the other's value.

Hypertrophy mechanisms Creatinestrong · 1 cited

Phosphocreatine pools determine final reps of high-intensity sets, indirectly supporting mechanical-tension accumulation. 3-5 g/day creatine monohydrate is the most evidence-backed training supplement.

Hyperuricemia Endocrinestrong · 2 cited

High urate and the metabolic-syndrome cluster (glucose, lipids, blood pressure, central adiposity, fatty liver) are mutual risks that reinforce each other, and the mechanism runs both ways rather than one causing the other.

IBD Ironstrong · 1 cited

ESPEN keeps oral iron first-line only when clinically inactive; when active or haemoglobin is under 100 g/L, first-line is intravenous. Forcing oral iron in a flare leaves unabsorbed iron in an inflamed lumen.

Kidney Stones Hypertensionstrong · 2 cited

One diet doing two jobs: bring sodium down and urinary calcium follows (the same path by which DASH lowers blood pressure), plus the citrate that fruit and vegetables bring — which makes DASH read almost like a stone-prevention protocol.

L-Tyrosine Nervousstrong · 2 cited

Tyrosine shares the LAT1 door into the brain with BCAA and tryptophan; hydroxylase is near saturation at rest, so extra tyrosine at the door only refills catecholamines while they are being spent.

Muscle Bonestrong · 1 cited

Muscle pull is the mechanical signal for bone remodeling — sarcopenia and osteoporosis co-occur in aging (osteosarcopenia). Resistance training targets both simultaneously.

Niacin Riboflavinstrong · 2 cited

NADH and FADH₂ feed the ETC at two entry points — B3 and B2 are the chain's twin inputs.

Osteoporosis Sarcopeniastrong · 2 cited

Older people should eat less protein is a mistaken cultural expectation, and it damages two things at once: bone matrix and muscle. Bone density and muscle mass decline together and jointly set fall risk, so they are managed together.

Periodontium Digestivestrong · 1 cited

The gingival sulcus is another niche held by neutrophils; once a keystone pathogen turns the guard, leaked inflammation becomes food — the same class of loop as a gut community feeding on inflammation.

Phosphorus Calciumstrong · 2 cited

Bone mineral is calcium phosphate; bone health is not calcium alone.

Recovery science Insomniastrong · 1 cited

Bidirectional: training improves sleep (Kredlow 2015 latency ↓13 min); sleep improves training adaptation (Mah 2011 Stanford basketball). Without sleep, training effects run at 50-70%.

Resistance training basics Musclestrong · 1 cited

Compound lifts drive both mechanical tension and neural recruitment simultaneously across multi-joint chains — the origin of whole-body training adaptation.

Skin & Hair Immunestrong · 2 cited

Skin-resident Langerhans cells + skin microbiome are front-line innate immunity sentinels; atopic dermatitis is barrier failure + Th2 immune skew combined.

Type 2 Diabetes PCOSstrong · 2 cited

Sex-hormone imbalance amplifies insulin resistance: higher androgens in PCOS worsen it, while resistance itself lowers SHBG and pushes free androgen up — a loop that turns on its own, which is why both sides need managing together.

Urolithin A Gut Microbiomestrong · 1 cited

Ellagitannins become urolithin A only through some gut microbes; without that community, pomegranate does not make the molecule.

Vitamin D Vitamin K2strong · 2 cited

D imports calcium; K2 routes it to bone, not arteries.

Vitamin E Seleniumstrong · 2 cited

GPx (a selenoenzyme) clears H₂O₂ in cytosol; α-tocopherol halts lipid peroxidation in membranes. Two phases, one ROS strategy.

VO2max Heartstrong · 1 cited

Cardiac output + O₂ transport + muscle extraction determine VO2max. Mandsager 2018 JAMA Open: high VO2max → all-cause mortality ↓5×, larger than any single CV intervention's effect.

Zone 2 training Heartstrong · 1 cited

Long-term Zone 2 → mitochondrial biogenesis + capillary density + endothelial NO. The deepest cardiovascular adaptations come from low-intensity volume, not short high-intensity bursts.

Choline Folatemoderate · 2 cited

Choline supplies the BHMT remethylation backup to MTR (B12/folate). Low folate raises choline demand.

Coenzyme Q10 Heartmoderate · 2 cited

Q-SYMBIO (Mortensen 2014, N=420, chronic HF) CoQ10 100 mg × 3/d × 2 yr halved all-cause and CV mortality. Statin therapy depletes endogenous CoQ10, plausibly contributing to myalgia (Banach 2015 meta: 100-200 mg/d reduces statin-associated myalgia).

Coenzyme Q10 Migrainemoderate · 1 cited

Sandor 2005 double-blind RCT (N=42) CoQ10 100 mg × 3/d × 3 mo cut migraine days ~50%; AHS 2012 lists it as Level B prevention. Slow onset (4-12 wk); together with Mg + B2 + fish oil forms atlas's 'nutritional quad' for migraine prophylaxis.

Creatine HMBmoderate · 2 cited

Sarcopenia + elderly combo: creatine increases anabolism; HMB suppresses catabolism. Stronger evidence in acute-illness, bedridden, or chronic-disease low-muscle elderly (Deutz, Bear). Marginal in healthy young.

Curcumin Fats & Omega-3moderate · 1 cited

Anti-inflammatory stack: curcumin (NF-κB / COX-2 inhibition) + EPA/DHA → pro-resolving eicosanoids (resolvins, protectins). Moderate combined evidence in chronic inflammation (RA, IBD, NAFLD); weak monotherapy.

Depression & Anxiety Fats & Omega-3moderate · 2 cited

Mocking 2016 Translational Psych meta (N=1233, 13 RCT): EPA ≥60% of total omega-3 at ≥1 g/d × 8-12 wk as SSRI augmentation → MDD remission + small-to-moderate improvement (SMD 0.40). SMILES 2017 Mediterranean diet includes ≥2 fish meals/wk.

Dyslipidemia Chronic Inflammationmoderate · 2 cited

ApoB particles entering the arterial wall is only the start; the inflammation that follows is what drives a plaque toward rupture, and part of the statin benefit is plaque stabilisation.

Elderly resistance training Vitamin Dmoderate · 2 cited

Bischoff-Ferrari 2019: RT + adequate vitamin D doubles strength gains vs RT alone. VDR is expressed in skeletal muscle and modulates protein synthesis.

Elderly resistance training Bonemoderate · 2 cited

Elderly RT triggers muscle-pull mechanostat → bone remodeling → BMD ↑. Liu 2009 Cochrane: high-intensity RT in 90+ reverses sarcopenia + improves bone markers.

Eyes · Myopia · Screens Morning Light & Circadianmoderate · 2 cited

One dose of outdoor light does two jobs: it slows axial elongation of the eye (time outdoors is the strongest-evidence myopia lever we have) and it resets the circadian clock through retinal ipRGCs. Sending a child outside buys both.

Fats & Omega-3 Vitamin Emoderate · 2 cited

Highly polyunsaturated fats (EPA/DHA) oxidize more readily — membrane α-tocopherol demand rises with fish-oil intake.

Fats & Omega-3 Heartmoderate · 3 cited

High-dose EPA (4g/d icosapent ethyl) in REDUCE-IT (N=8,179) cut major CV events 25%; standard fish-oil dose (1g/d EPA+DHA) showed modest/null effects in VITAL / ASCEND. Dose, form, and patient stratification matter.

Fish Oil Heartmoderate · 1 cited

Fish-oil clinical benefit depends entirely on actual EPA+DHA dose and baseline TG. The 'fish oil protects the heart' claim is marketing oversimplification; the strongest evidence is for icosapent ethyl in high-TG + high-CV-risk patients.

Fish Oil Vitamin Dmoderate · 2 cited

The VITAL trial design itself was omega-3 + D co-intervention; overall depression/immune/CV hard endpoints null, but subgroup + exploratory analyses showed signal in low-baseline populations. Clinical: not 'supplement everyone' — combine only when correcting documented deficiency.

Fluoride Calciummoderate · 2 cited

Fluoride supports enamel remineralization alongside calcium-phosphate mineral.

Folate TMG / Betainemoderate · 2 cited

There are two routes back from homocysteine to methionine: one runs on folate and B12, the other has TMG (betaine) hand over a methyl directly. Under methylation strain they run in parallel — neither replaces the other.

GERD Sleep Apneamoderate · 2 cited

The two feed each other: the negative intrathoracic pressure of a breathing event pulls stomach contents up, and nocturnal reflux fragments sleep in turn. Treating both together beats treating either alone.

IBS Probioticsmoderate · 2 cited

Ford 2018 AGA meta: strain-specific — Lacto + Bifido blends help IBS-M/IBS-D global symptoms at B-tier evidence; 'broad-spectrum' is mostly a category error.

Insomnia Magnesiummoderate · 2 cited

Mg²⁺ plugs NMDA receptors and boosts GABA-A — insomnia + anxiety + cramps form a classic Mg-deficient triad.

Insomnia Glycinemoderate · 2 cited

Yamadera 2007 RCT: 3 g glycine pre-bed improved PSG metrics and morning freshness via peripheral vasodilation + core-temp drop.

Iron Vitamin Cmoderate · 1 cited

Reverse of C → Fe; classic same-meal pairing for plant-iron uptake.

Iron Folatemoderate · 2 cited

Both are required inputs to red-cell production, but their deficiencies pull opposite ways: iron shortage makes cells small, folate/B12 shortage stalls DNA synthesis and makes them large. Lack both and MCV lands back in the 'normal' band, hiding both problems at once.

L-Citrulline Beta-Alaninemoderate · 2 cited

Pre-workout pair: citrulline → NO → blood flow ↑; beta-alanine → carnosine → H+ buffering. Different mechanisms, same window — combined effect strongest in multi-joint high-rep resistance.

L-Theanine Caffeine + L-Theaninemoderate · 3 cited

Theanine's most solid evidence line is not focus on its own but changing what caffeine feels like: 100 mg theanine with 50 mg caffeine — the 1:2 protocol — beats either alone on attention-switching and accuracy while damping the jitter caffeine brings.

Liver Kidneymoderate · 2 cited

Drug metabolism: liver Phase I/II metabolites are mostly renally excreted. Hepatic or renal impairment burdens the other — combined pharmacokinetics is the core risk in polypharmacy.

Lutein + Zeaxanthin Astaxanthinmoderate · 1 cited

Complementary carotenoid distribution: lutein + zeaxanthin concentrate at the macula center; astaxanthin populates retinal periphery + scavenges ROS. Long screen / eye strain / age-related AMD prevention — three-component stack is the rational combination.

Magnesium Migrainemoderate · 1 cited

Peikert 1996 Cephalalgia (N=81) Mg citrate 600 mg/d × 12 wk cut migraine frequency 41.6% (placebo 15.8%). Mechanism: NMDA antagonism + cerebrovascular smooth muscle relaxation + raised CSD threshold. AHS 2012 Level B prevention.

Melatonin Glycinemoderate · 1 cited

Sleep dual signal: melatonin = 'it's night' (SCN phase); glycine drops core body temp via peripheral vasodilation + modulates NMDA → reduces anxiety. Low-dose melatonin (0.3-0.5 mg) + 3 g glycine pre-bed is a low-cost complementary stack.

Muscle Nervousmoderate · 1 cited

Exercise-induced muscle releases BDNF + irisin → enters blood → crosses BBB or acts at periventricular regions → neuroplasticity + cognition + antidepressant effect. The molecular basis of 'exercise is the best antidepressant.'

Potassium & Sodium Magnesiummoderate · 2 cited

Potassium/sodium shape membrane potential and fluids; magnesium supports ATP and relaxation.

Potassium & Sodium Calciummoderate · 2 cited

High K (especially K-citrate) reduces urinary calcium loss → indirect bone protection; the DASH-bone overlap. Opposite to high-sodium calciuresis — K offsets Na's bone tax.

Protein Carbs & Fibermoderate · 2 cited

Post-exercise GLUT4 + Leu-mTORC1 share the insulin/AMPK window: glycogen reload + MPS run together (30-90 min). Protein + adequate carb beats protein alone for recovery.

Protein Zincmoderate · 3 cited

Animal protein prises zinc out of phytate's grip in the gut lumen, so the plant-source zinc in the same meal absorbs better too — that's the other half of why vegans need more zinc.

Riboflavin Ironmoderate · 2 cited

B2 (as FAD) cofactors the ferroportin/hephaestin oxidation step that releases dietary iron into blood. B2 deficiency worsens iron-deficiency anemia; combined repletion outperforms iron alone in B2-deficient populations.

TMG / Betaine Vitamin B12moderate · 2 cited

TMG fuels the BHMT backup; when MTR is limited by B12 / folate / MTHFR, betaine carries Hcy back to methionine.

Training injuries Collagen peptidesmoderate · 1 cited

Shaw 2017: 15 g collagen peptides + 50 mg vitamin C 30-60 min pre-training → tendon collagen synthesis ↑. Useful in tendinopathy rehab.

Ultra-processed Foods Sweetenersmoderate · 2 cited

UPF 'zero-sugar' reformulations are the main delivery vehicle for aspartame / sucralose / erythritol. Hall 2019 RCT + WHO 2023 both show: cutting sugar ≠ cutting total intake — UPF whole-design is the lever.

Vitamin B6 Vitamin B12moderate · 1 cited

B12 + folate run remethylation; B6 routes Hcy to transsulfuration. Any one short and Hcy rises.

Vitamin C Vitamin Emoderate · 1 cited

C (aqueous) and E (lipid) work together; C recycles oxidized E.

Zinc Vitamin Cmoderate · 1 cited

Zinc + vitamin C team up on wound healing and immune function.

Magnesium Vitamin B12weak · 1 cited

Magnesium participates in several B12-dependent methylation steps.

Niacin Chromiumweak · 2 cited

Historical 'glucose tolerance factor' (GTF) paired Cr with niacin in 70s-80s marketing. EFSA 2014 + purified LMWCr studies revoked Cr's essential-nutrient status. Kept as a historical edge for context — not a clinical recommendation.

α-GPC + CDP-choline Caffeine + L-Theanineweak · 2 cited

Among the nootropic shelf, one of the few combinations with real synergy evidence is caffeine plus L-theanine — not stacking cholines on top. Before combining, ask what you are actually short of: attention suppressed by adenosine, or acetylcholine.