Vitamin D3

INCI: Cholecalciferol
Category: Vitamin, skin-support nutrient
Used in: Supplements, skincare
Typical Usage Level (Topical):
Very low concentrations in specialized formulations due to its potency

Typical Usage Level (Oral Supplements):
600–800 IU per day for general nutritional support
Higher doses may be recommended under medical guidance depending on deficiency levels.

What This Ingredient Does

Vitamin D3 (cholecalciferol) is a fat-soluble vitamin that plays an important role in immune regulation and skin health. It helps regulate skin cell growth, differentiation, and repair, which are essential processes for maintaining a healthy skin barrier.

In dermatology, vitamin D is known to influence immune responses in the skin and support barrier integrity. Most vitamin D3 in the body is produced when the skin is exposed to sunlight. However, dietary intake and supplementation are often necessary to maintain adequate levels, particularly in individuals with limited sun exposure.

Key Benefits

• Supports healthy skin barrier function
• Contributes to balanced skin cell turnover
• Plays a role in immune regulation
• Helps support overall skin resilience
• Important for overall systemic and skin health

Who It’s Best For

• Individuals with vitamin D deficiency
• People with limited sun exposure
• Skin needing support for barrier health and repair
• Those seeking overall skin and immune health support

Clinical Note by Dr. Su

M.D. Dermatologist

Vitamin D3 plays an important role in both skin and immune health. Maintaining adequate vitamin D levels through safe sun exposure, diet, or supplementation can support overall skin function and systemic well-being.