Doctor's Best Vitamin D3 supports healthy bone density and structure as it is required for optimal calcium absorption. More than that, this nutrient enhances and regulates immune function, supports optimal cardiovascular function and enhances cellular function. It is made of D3, the naturally-occurring form of vitamin D.
Research shows that supplemental vitamin D3 (cholecalciferol) is significantly more efficient at converting to active vitamin D in the body than vitamin D2 (ergocalciferol). This makes vitamin D3 the preferred supplemental form of this nutrient. Vitamin D deficiency is prevalent with more than 75% of Americans deficient in this nutrient. People who live in the northern half of the United States are at a greater risk of being Vitamin D deficient due to a lack of sunlight.
Vitamin D from dietary intake or sun exposure requires two activation steps in the body. The first activation occurs in the liver, while the second activation occurs in the kidneys, allowing for regulation of calcium metabolism.
Vitamin D receptors are present throughout the body, in tissue such as the skin, cartilage, heart, prostate, bones and intestines so the second activation step also takes place in local tissues.
Vitamin D plays a role in most organs and systems of the body. It is hormone-like, known to interact with over 200 different genes, and plays a crucial regulatory role as a metabolic activator for a multitude of metabolic processes
Serving Size: 1 Softgel
||Amount Per Serving
|Vitamin D3 (as Cholecalciferol)
||125 mcg (5000 IU)
Other Ingredients: Extra virgin olive oil, softgel capsule (gelatin, glycerin, purified water).
Suggested Adult Use: Take 1 capsule daily without food, or as recommended by a nutritionally-informed physician. Store in a cool dry place.
Non-GMO / Gluten Free / Soy Free.
Consult your healthcare provider before use if you are taking any prescription medications or if you have a medical condition.
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2. California Proposition 65 WARNING: Some products on this website contains progesterone, a chemical known to the State of California to cause cancer. Consult with your physician before using this product
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Probiotics Shipping Instructions|Cold-Pack Service
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