Vitamin D dosage estimator
Adults: 600-800 IU daily (RDA). Deficient: 1,000-4,000 IU under physician supervision.
⚠ Educational estimates only — not medical advice. Consult a healthcare professional.
About this tool
Vitamin D dosage estimator is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
Category: Health & Fitness. Browse more Health & Fitness tools.