Yes, gummy vitamins technically break a fast. A typical two-gummy serving has about 15 calories and 2 to 3 g of sugar, and some brands use four gummies with 45 calories and 7 g of sugar. For a weight-loss fast the effect is small; a strict fast is over.
| Calories | ~15-45 kcal per serving |
|---|---|
| Breaks a weight-loss fast? | Partial |
| Breaks ketosis? | No |
| Breaks autophagy? | Yes |
| Insulin impact | Small rise from the sugar |
A gummy vitamin is a small candy that carries vitamins. The base is glucose syrup, sugar and gelatin or pectin, so each serving brings real carbohydrate. Two gummies of a popular women's multi list 15 calories and 3 g of added sugar. That is small next to a meal, yet enough to raise insulin a little and break a fast defined by calories or done for autophagy.
Sugar-free gummies swap the sugar for maltitol or sorbitol, which still carry about 2 to 3 calories per gram and raise blood sugar a little. Many gummy multis also contain vitamins A, D, E and K, which are absorbed better with a meal. Taking your gummies with your first meal solves both problems at once. If you want a vitamin during the fast itself, tablets and capsules have essentially no calories.
Take gummy vitamins at the start of your eating window. On a weight-loss fast a single serving does little harm; on a clean or autophagy fast, wait until you eat.
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