Vitamin Absorption Calculator — Estimate nutrient uptake & bioavailability

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.

Optimize your nutrient intake

Our registered nutritionists can help you design a supplementation plan tailored to your age, diet, and health conditions.

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