Vitamin D

Definition

Vitamin D is a fat-soluble vitamin that is essential for maintaining healthy bones and supporting the immune system.

Scientific / Technical Definition

Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and multiple other biological effects. The most important compounds in this group are vitamin D3 (cholecalciferol) and vitamin D2 (ergocalciferol).

Benefits

• Supports bone health by aiding calcium absorption
• Boosts the immune system
• May reduce the risk of chronic diseases like heart disease
• Supports mental health and mood regulation
• May help reduce inflammation

Examples

• Fatty fish like salmon and mackerel
• Fortified foods such as milk and cereals
• Egg yolks
• Cheese
• Sunlight exposure enables the body to produce Vitamin D

Additional Information

• Known issues: Vitamin D toxicity can occur from using supplements excessively, leading to hypercalcemia which can damage the heart, kidney, and bones.

Related Terms

• Calcium
• Vitamin D Deficiency
• Rickets
• Osteoporosis
• Immune System

References

• Vitamin D - Health Professional Fact Sheet
• Vitamin D: Importance in the Prevention of Cancers, Type 1 Diabetes, Heart Disease, and Osteoporosis