Can I take vitamins while fasting?
Usually tiny calories, timing matters
0-10 kcal
Maybe - use caution. Most vitamin tablets have negligible calories, but some vitamins absorb better with food and some upset an empty stomach.
A pill is not the same as a meal, but supplement timing should follow the label and your clinician.
NIH ODS treats vitamins and minerals as dietary supplements with ingredient-specific use and safety considerations.
Base tier: 60/100 for "Use caution". Item adjustment: +14 points for calories, nutrient signal, product variability, and safety caution. Final Fast Score: 74/100.
Take water-soluble vitamins as tolerated; move fat-soluble vitamins or nausea-triggering supplements to the eating window.
Follow medical instructions for prescribed supplements such as iron, vitamin D, or prenatal vitamins.
The Fast Score is an editorial estimate of clean-fast strictness, not medical advice. Goals vary — if you fast for glucose, appetite, or medical reasons, follow your clinician.