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Vitamins · Ingredient profile
Vitamin D3
Calcium absorption & bone health
Vitamin D supports calcium absorption, bones, muscles, nerves, and immune function. D3, or cholecalciferol, is a common supplemental form.
The essentials
Functions & potential benefits
- Helps the body absorb calcium.
- Supports bone maintenance.
- Contributes to muscle and immune function.
Everyday nutrition
Where it comes from.
Fatty fish, egg yolks, and vitamin-D-fortified foods.
Read the NIH reference ↗Evidence, in perspective
Know the limits.
D3 can raise vitamin D levels when insufficient. More vitamin D is not a proven way to improve every aspect of health.
Read the NIH reference ↗Important considerations
Before choosing a supplement.
Excess supplemental vitamin D can raise blood calcium to harmful levels. Seek guidance for high doses or interacting medicines.
Read the NIH reference ↗Ingredient education—not a product claim. This describes the ingredient, not a verified Herbs To Discover formula. Supplement Facts, serving amounts, directions, certifications, and availability are not yet published. Source review date 2026-09-15. Read the NIH reference ↗ · Editorial approach.