Weight Loss

5 Unusual Things that Break a Fast

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Fluoride makes the enamel of your teeth harder and more resistant to acid wear – fluoride only makes up about 0.15% of most toothpastes, although prescription-strength fluoride toothpastes contain more than 1% of fluoride

Study intfound that sodium fluoride (often used in toothpaste) can increase plasma concentrations of insulin



Most toothpastes contain saccharin, aspartame, or xylitol to add a bit of sweetness

As we know, there’s some research showing that a sweet taste may trigger an insulin response

Study in the journal Appetite found saccharin increased plasma insulin concentrations (colgate uses saccharin in its formula)

Note on Thickeners:

Carrageenan is a common thickener added to toothpastes


Uses sodium fluoride and and saccharin as well


Softgel Vitamins

No, they contain oils with caloric values

Non-softgel Vitamins (Water Soluble)

Study from = had subjects fast with and without vitamins C & E and found that there was a 2.7% increase in t expression in the non-vitamins group

But no change in expression were found in those who took daily oral supplements of Vitamin C and E because the cells were relatively sheltered from experiencing any oxidative stress

SIRT3 is a gene that is part of a pathway that works to prevent free radical production and improve cellular repair processes


There’s conflicting reports about whether or not Xylitol affects insulin or blood glucose, but a study in Diabetologica found that, in human subjects, xylitol taken by mouth in solution as a single 30 g dose caused no rise in plasma insulin concentration but did produce a minimal rise in blood glucose


Additionally, often processed from corn, and often genetically modified.

Additionally, since it’s not metabolized and broken down in the stomach like other sweeteners so it reaches parts of the intestines that regular sugar wouldn’t

Since it has the ability to kill many strains of bacteria including streptococcus mutans, which is one of the reasons it is beneficial for dental health, it may also negatively affect gut bacteria


Erythritol did not affect serum levels of glucose, insulin or other serum constituents. More than 90% of ingested erythritol was readily absorbed and excreted in urine without degradation. This fact suggests that available energy of erythritol in human is less than 1.7 kJ/g (0.4 kcal/g).


The downside here is that erythritol will still stimulate digestive enzymes, technically breaking a fasting for those doing it for longevity purposes

Coconut Water

Per ounce, most unflavored coconut water contains 5.45 calories, 1.3 grams of sugar, 61 milligrams of potassium, and 5.45 milligrams of sodium

Also contains a small amount of vitamin C per serving


A study from t looked at the effects of BCAA supplementation on plasma concentrations of free amino acids, insulin, and energy substrates in a group of men aged 22-25

Participants partook in an overnight fast and researchers found that plasma insulin levels spiked after BCAA ingestion


Additionally, a study in the Journal of Diabetes found that leucine activates mTOR signaling – leucine has an affinity for mTOR


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