layers n function - vitamin D

Vitamin D Sources

• Dietary Sources: Foods provide a very poor source of vitamin D.

• Endogenous Production: The primary source is synthesis by keratinocytes in the epidermis upon exposure to sunlight.

Production Process

• Sunlight Requirement: Sunlight is essential to trigger the production of vitamin D in the skin.

• Role of Organs: Vitamin D exemplifies teamwork among different organs:

  • Skin: Synthesizes vitamin D.

  • Liver: Converts vitamin D to calcidiol.

  • Kidneys: Convert calcidiol to calcitriol, the fully active form of vitamin D.

Functions of Vitamin D

• Calcium Absorption: Known for its role in enhancing calcium absorption in the gut.

• Immune Regulation: Research indicates it has significant immunoregulatory functions.