Artificial & Non-nutritive Sweeteners

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Connected to · 2

synergy · 1

Ultra-processed Foods
Many zero-sugar ultra-processed drinks and foods rely on sweeteners such as aspartame, sucralose and erythritol. WHO's 2023 guideline conditionally advises against using non-sugar sweeteners for weight control, because there is no evidence of long-term weight benefit; and in Hall 2019, with the two diets matched for calories, sugar, fat and fiber, people still ate more on the ultra-processed diet. The problem lies in the design of the whole food, not only its sugar.

regulates · 1

Carbs & Fiber
In the Suez 2022 randomized controlled trial (120 healthy adults, 2 weeks), all four sweeteners changed the gut microbiome, and the saccharin and sucralose groups had clearly worse glycemic responses; when microbiomes from the strongest and weakest responders were transplanted into germ-free mice, the mice largely mirrored their donors, which supports, in mice, the microbiome as a link in the chain. The earlier Suez 2014 was mainly mouse work plus a small human observation. Like fiber fermented by gut bacteria and its effect on blood sugar, this is a link between the microbiome and metabolism.

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Two kinds of sugar-free sweetener

EVIDENCEGUIDE 1 · REVIEW 2 · MECH 1

READ THE ORIGINAL

Under a sugar-free label sit two completely different families. Tell them apart and you can predict whether a whole bar of sugar-free chocolate will send you to the toilet.

The first family fools the tongue. Its molecules fit the sweet-taste receptors on your tongue, and once a receptor is hooked it reports sweet to the brain. They are so intensely sweet that a pinch is enough. You cannot digest most of them, so they pass through the gut and leave unchanged. Aspartame is the exception: it is split into two amino acids, but the amount is so small that the calories can be ignored.

The second family is the sugar alcohols. They keep a sugar skeleton, and the small intestine absorbs only part of them. The rest reaches the large intestine, where it pulls water into the gut and is fermented by bacteria into gas. More water plus more gas means bloating and loose stools. One of them, xylitol, is highly toxic to dogs: if a dog eats some, contact a vet right away.

So low in calories does not mean no effect on the body. Sugar alcohols act right there in the gut. Whether sweeteners act somewhere else — on gut bacteria, on blood platelets, on the brain — is exactly what they are being studied for now.

Educational content, not medical advice — consult a clinician.

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Artificial & Non-nutritive Sweeteners

Story

Connected to · 2

synergy · 1

Ultra-processed Foods
Many zero-sugar ultra-processed drinks and foods rely on sweeteners such as aspartame, sucralose and erythritol. WHO's 2023 guideline conditionally advises against using non-sugar sweeteners for weight control, because there is no evidence of long-term weight benefit; and in Hall 2019, with the two diets matched for calories, sugar, fat and fiber, people still ate more on the ultra-processed diet. The problem lies in the design of the whole food, not only its sugar.

regulates · 1

Carbs & Fiber
In the Suez 2022 randomized controlled trial (120 healthy adults, 2 weeks), all four sweeteners changed the gut microbiome, and the saccharin and sucralose groups had clearly worse glycemic responses; when microbiomes from the strongest and weakest responders were transplanted into germ-free mice, the mice largely mirrored their donors, which supports, in mice, the microbiome as a link in the chain. The earlier Suez 2014 was mainly mouse work plus a small human observation. Like fiber fermented by gut bacteria and its effect on blood sugar, this is a link between the microbiome and metabolism.

Read full story

Stop 1/5

Two kinds of sugar-free sweetener

EVIDENCEGUIDE 1 · REVIEW 2 · MECH 1

READ THE ORIGINAL

Under a sugar-free label sit two completely different families. Tell them apart and you can predict whether a whole bar of sugar-free chocolate will send you to the toilet.

The first family fools the tongue. Its molecules fit the sweet-taste receptors on your tongue, and once a receptor is hooked it reports sweet to the brain. They are so intensely sweet that a pinch is enough. You cannot digest most of them, so they pass through the gut and leave unchanged. Aspartame is the exception: it is split into two amino acids, but the amount is so small that the calories can be ignored.

The second family is the sugar alcohols. They keep a sugar skeleton, and the small intestine absorbs only part of them. The rest reaches the large intestine, where it pulls water into the gut and is fermented by bacteria into gas. More water plus more gas means bloating and loose stools. One of them, xylitol, is highly toxic to dogs: if a dog eats some, contact a vet right away.

So low in calories does not mean no effect on the body. Sugar alcohols act right there in the gut. Whether sweeteners act somewhere else — on gut bacteria, on blood platelets, on the brain — is exactly what they are being studied for now.

Educational content, not medical advice — consult a clinician.