// multi-utility computation suite · offline · instant · precise
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│ [c] calcalyst_ │
│ computation suite │
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health.vitamin-d Calculator
Estimates cutaneous vitamin D synthesis from UV index, skin type (Fitzpatrick scale), and exposure duration and area. Vitamin D synthesis requires UVB radiation (290–315 nm) — sunscreen SPF 30 reduces synthesis by 95%, explaining why supplementation is recommended for most people in northern latitudes.
Inputs
Sun Min
Reference formula or conversion factor shown for context.
Skin
Reference formula or conversion factor shown for context.
Lat
Reference formula or conversion factor shown for context.
Food Iu
Reference formula or conversion factor shown for context.
Results
estimated daily VitD (IU)
The value at the specified point or condition.
from sun (est. IU)
Sample size or count used in the calculation.
from food (IU)
Reference formula or conversion factor shown for context.
status
Current state of the system, process, or metric — typically pass/fail, healthy/warning/critical, or a descriptive classification.
recommended
Sample size or count used in the calculation.
upper limit
Reference formula or conversion factor shown for context.