Vitamin D



Vitamin D description

A fat-soluble vitamin that may have antioxidant and skin-soothing benefits for skin, among other beneficial traits. Vitamin D is formed in the skin by sunlight (primarily unprotected exposure to UVB radiation), or may be obtained from fortified foods and oral supplements, which are the preferred methods compared to exposing your skin to sunlight.

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


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Not rated