antagonism
antagonism · 22
Carbs & FiberFructose Metabolismstrong · 2 cited
Soluble fiber forms a gastric gel that slows fructose absorption and KHK exposure. Whole-fruit safety is fiber-mediated — fruit juice strips it and becomes a liquid-fructose ambush.
Carbs & FiberUltra-processed Foodsstrong · 1 cited
UPF strips the food matrix → near-zero fiber → high energy density (Hall 2019: 2.06 vs 1.20 kcal/g) → +500 kcal/day. Fiber loss IS the UPF harm mechanism, not a side note.
CBT-I · Insomnia Self-HelpSleep Apneastrong · 2 cited
Sleep restriction transiently increases daytime sleepiness, so someone with untreated sleep apnoea should not self-administer it — that stacks two things both cutting into alertness. CPAP first, then CBT-I.
InsomniaSleep Apneastrong · 2 cited
When insomnia comes with sleep apnoea, hypnotics work against you: they relax upper-airway muscle and blunt the arousal response, making breathing events longer and deeper. The route here is CPAP, not a sleeping pill.
Sleep Architecture & Sleep DebtCaffeine + L-Theaninestrong · 2 cited
Process S in the two-process model is homeostatic sleep pressure: the longer you are awake the higher it climbs, and accumulating adenosine is one of its molecular signals. Caffeine blocks the adenosine receptor — it does not remove the tiredness, it hides the gauge.
SpirulinaVitamin B12strong · 1 cited
Spirulina contains pseudocobalamin — chemically near-identical to real B12 but unusable by humans AND competes for absorption receptors. 'Vegan B12 from spirulina' is one of the most dangerous marketing claims on the atlas — serum B12 looks normal while nerve damage continues.
Long-term high-dose zinc can suppress copper absorption.
Caffeine + L-TheanineIronmoderate · 2 cited
What blocks non-heme iron is the polyphenols in tea and coffee, not caffeine itself — a strong cup with a meal can wipe out most of that meal's non-heme iron absorption. Moving tea and coffee between meals is enough.
Calcium competes with non-heme iron at the gut; high-calcium meals lower iron absorption.
CBT-I · Insomnia Self-HelpCaffeine + L-Theaninemoderate · 2 cited
The sleep-hygiene list is not wrong — it removes obvious obstacles, and with a 5-6 hour caffeine half-life an afternoon cut-off makes sense. But note what it is in most CBT-I trials: the control arm. Hygiene alone does not treat chronic insomnia.
ChlorellaVitamin B12moderate · 2 cited
Chlorella also makes pseudo-B12 (corrinoid analogues): the cobalt is still there, the DMB group beneath it swapped out. Your enzymes cannot use it, yet it still occupies intrinsic factor, the carrier that brings real B12 across the gut — so a serum B12 number can be the real thing and the counterfeit added together.
Does stretching prevent injuryWarm-up & cool-downmoderate · 2 cited
Holding a stretch for tens of seconds before performing briefly lowers subsequent strength and power. For anything explosive, the pre-game static routine buys little injury protection and costs output up front — warm up with dynamic movement.
Fasting & TRESarcopeniamoderate · 2 cited
Compressing the eating window also compresses how many times protein can be distributed — and muscle preservation runs on repeated hits of 25-40 g protein with 2.5 g or more of leucine. The conflict is sharpest in older adults.
ManganeseIronmoderate · 2 cited
Mn and Fe share the DMT1 transporter — iron deficiency upregulates DMT1 → Mn uptake increases compensatorily → manganese toxicity risk rises under environmental exposure. Iron-deficient children in high-Mn well-water regions are silent victims.
MolybdenumCoppermoderate · 2 cited
High Mo + sulfur → forms tetrathiomolybdate (TM) → chelates Cu → livestock 'peat scours' Cu deficiency; clinically used as TM (Coprexa) for Wilson's disease (copper toxicity). High-Mo drinking water requires Cu monitoring.
Potassium & SodiumCalciummoderate · 2 cited
High sodium → reduced distal-tubule Ca reabsorption → urinary Ca ↑. Each +2.3 g Na = +25 mg urinary Ca. Chronic high-Na + low Ca + low D = silent bone-loss trifecta.
Testosterone & AgingChronic Stress · HPA Axismoderate · 2 cited
Sustained cortisol suppresses the HPG axis, so chronic stress is itself a testosterone-lowering factor. When a low reading turns up, stress and sleep are usually worth addressing before any supplement.
Vitamin EVitamin K1moderate · 2 cited
High-dose vitamin E (>800 IU/day) interferes with γ-carboxylation of K1-dependent clotting factors (II/VII/IX/X) → bleeding risk. Particular concern with warfarin/DOAC or recent surgery. Dietary doses (~15 mg/day) are fine.
High-dose zinc inhibits iron absorption (and vice versa) — don't megadose together.
Folic acid + Zn form insoluble complexes in gut → mild Zn absorption decrease at supplement doses. Clinically weak but informs prenatal multivitamin co-dosing design.
MicroplasticsMagnesiumweak · 2 cited
Nano-scale particles (under 100 nm) can enter cells and even mitochondria, disturbing the electron transport chain, raising ROS and lowering ATP output — and ATP does its work in the body as an ATP-Mg complex. This is a mechanistic inference; the human evidence is still early.
High calcium mildly reduces zinc absorption — usually trivial unless zinc is borderline.