Supplementation Needs Calculator
Estimate your daily vitamin D requirement and compare other essential nutrients based on your age, diet, sun exposure and current intake. Get personalized supplementation recommendations.
Step 1: Personal Profile
Why these matter
Age, gender and sun exposure strongly influence vitamin D needs. Dietary pattern affects B12, iron and other micronutrients.
Step 2: Vitamin D & Absorption
Bioavailability tip
Vitamin D from supplements is usually well absorbed, but factors like fat intake matter. We use 90% as default.
Your Supplementation Plan
Recommended daily Vitamin D supplement
Estimated daily needs for key nutrients
| Nutrient | Estimated need* | Common food sources | Suggested supplement |
|---|
*Based on dietary pattern, age and gender. Values are approximations.
Vitamin D intake & goal
How supplementation is calculated
Supplement = (target – current) / (bioavailability/100)
Your target is adjusted by age, sun exposure and risk factor. The result is the daily IU you likely need from supplements to reach the desired level.
Need a tailored supplementation plan?
Our registered dietitians can review your blood work and lifestyle to create a precise nutrient strategy.
Consult an expert