Yes, you can take certain vitamins while fasting without breaking it, but it depends on the type and formulation. Water-soluble vitamins like B-complex and C are generally safe, while fat-soluble ones (A, D, E, K) are best during eating windows for absorption.

Quick Scoop

Fasting—whether intermittent like 16:8 or extended—sparks benefits like weight loss and metabolic reset, but nutrient gaps worry many. Imagine Sarah, a busy mom starting her fast at 8 PM: she wonders if her morning multivitamin ruins her progress. Good news: most pure vitamins won't spike insulin or calories enough to matter.

Safe Vitamins

These typically don't break a fast:

  • Water-soluble (B vitamins, C) : Dissolve in water, no calories; take anytime with water.
  • Electrolytes (sodium, potassium, magnesium) : Essential for hydration, zero impact.
  • Iron or creatine : Fine on empty stomach, pair iron with C for uptake.

Pro tip : Skip gummies or sweetened pills—sugar ends fasts fast.

Vitamins to Time Carefully

Fat-soluble ones need fat for absorption:

  • A, D, E, K : Save for meals; empty-stomach intake wastes them.
  • Multivitamins : Often mix types—eating window ideal, low-cal versions okay if pure.

Vitamin Type| Fasting-Safe?| Best Timing| Why? 13
---|---|---|---
Water-Soluble (B, C)| Yes| Anytime| No calories, quick absorb
Fat-Soluble (A, D, E, K)| No/Conditional| With food| Needs fat; poor uptake otherwise
Multis| Usually| Eating window| Mixed; check fillers
Electrolytes| Yes| Anytime| Hydration hero

Fasting Types Matter

  • 16:8 Daily : Water-solubles during fast; fats later.
  • 24-48 Hour : Dose B/C every 24 hours to avoid deficits.
  • Religious/Medical : Consult leaders or docs—rules vary.

Trending in 2025 forums: Folks on Reddit rave about electrolyte hacks during Dry January fasts, but warn B-vitamins can upset empty stomachs—chase with water!

"Water-soluble vitamins (B complex, vitamin C) are fine during fasting. Fat- soluble need food."

Multiple Views

  • Strict Autophagy Fans : Zero non-water intake—vitamins out.
  • Practical Weight Loss : Low-cal vitamins okay for adherence.
  • Doc Advice : Food-first; supplement smartly.

Always check labels for fillers. If fasting long-term, test levels—deficiencies sneak up. TL;DR Bottom : Pure water-soluble vitamins? Yes. Fat-soluble or sugary? Eating window. Consult pros for you.

Information gathered from public forums or data available on the internet and portrayed here.