What it does: It helps the body absorb calcium, supports strong bones and teeth, aids normal muscle function, and is involved in immune system regulation.
How it is used: Commonly taken to support bone and dental health, address vitamin D deficiency, maintain muscle performance, and promote normal immune responses, especially in people with low sun exposure.
Natural sources and supplement forms: When your skin is exposed to sunlight, your body produces vitamin D. Natural food sources include fatty fish, egg yolks, and liver, with fortified foods like milk and cereal providing additional amounts. Supplements come as vitamin D3 (cholecalciferol) or D2 (ergocalciferol), with D3 generally being more effective for raising vitamin D levels.
Why it appears in supplement formulas: Vitamin D is included to help support skeletal health and immune system balance, particularly for individuals at risk of deficiency due to limited sunlight, higher age, or dietary constraints.
What to know before use: Taking too much vitamin D over time can lead to elevated calcium levels in the blood; consult a healthcare provider if you have health conditions or use certain medications.
Interesting Fact
Vitamin D: The Sunshine Nutrient
Vitamin D is often called the 'sunshine vitamin' because your body can produce it when your skin is exposed to sunlight. Few foods naturally contain vitamin D; fatty fish like salmon, and fortified milk or cereal are primary dietary sources. This is why vitamin D is commonly included in supplements—to help people maintain adequate levels, especially in regions with limited sunlight.
