Vitamin Absorption Calculator
Estimate how much of a vitamin your body actually absorbs based on dosage, form, meal timing, and health factors. Optimize your intake for better bioavailability.
Step 1: Vitamin Details
Why form matters
Fat-soluble vitamins (A, D, E, K) absorb best with fatty meals. Liquid forms often have higher bioavailability than tablets.
Step 2: Absorption Factors
About bioavailability
Absorption can range from 5% to 95% depending on vitamin, form, and individual factors. This calculator gives an estimate — not medical advice.
Absorption estimate & comparison
Summary
Vitamin comparison
Dose response
Estimated absorbed amount
250 mg
Absorption rate: 50%
Bioavailable dose
250 mg
% of RDA / AI*
42%
Efficacy rating
Moderate
Form factor
Softgel
Bioavailability by vitamin type
| Vitamin | Typical form | Est. absorption | Effective dose (from 500 mg) | Rating |
|---|
Absorption vs dosage (estimated)
Diminishing returns
For many vitamins, absorption percentage decreases as dosage increases (saturable transport). This chart shows the estimated absorbed amount across different doses.
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Our registered nutritionists can help you design a supplementation plan tailored to your age, diet, and health conditions.
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