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  Vitamin D3, 5,000 IU, 120 Veg Caps

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Vitamin D3, the preferred bioavailability form, supports cell growth, immunity, and energy metabolism. It also plays an essential part in calcium absorption and bone density health.
Tablet Size: 4C
Retail $15.99
Our Price $4.49

Availability: Usually Ships in 1 to 2 Business Days

Description Supplement Facts


  • Supports strong bones, mineral balance, and gene regulation.
  • Fortifies the immune system and supports cell growth.

Product Information

Vitamin D is a fat soluble vitamin found in some plant and animal sources, but primarily produced by the body after exposure to the sunís ultraviolet (UV) rays. UV rays promote the skinís production of vitamin D. Vitamin D3 or calciferol is the most active form, while vitamin D2 or ergocalciferol is synthesized by plants and less available to humans (in fact, studies cited in the Journal of Clinical Endocrinology & Metabolism, indicate that Vitamin D3 is 87% better in humans, in terms of absorption and bioavailability, than D2).

Vitamin D functions primarily to maintain normal blood levels of calcium and phosphorus. By supporting healthy calcium absorption, vitamin D helps to maintain strong bones. Vitamin D also works synergistically with other vitamins, minerals, and hormones to promote bone mineralization. Unfortunately with aging, skin cannot synthesize vitamin D from the sun as efficiently.

Vitamin D has more recently been in the spotlight for immune system support. Vitamin D is thought to promote immune health by supporting regulation of cell growth and differentiation—the process that determines cellís ďjobĒ in the body. This regulation is particularly important as the differentiation of cells leads to a decrease in proliferation. Cellular proliferation, while essential for growth and wound healing, may foster harmful mutations, if uncontrolled.

Vitamin D has also shown great promise in maintaining the bodyís innate immune response as well as supporting appropriate autoimmune activity. Both these mechanisms are thought result from vitamin Dís regulation of T cell development.

More recent studies also suggest that Vitamin D may play a role in supporting healthy body fat levels.


  • Vitamin D may worsen hypercalcemia.
  • Hypercalcemina may contribute to arteriosclerosis, particularly in persons with kidney disease. Such members should use supplemental vitamin D cautiously.
  • Vitamin D is one of the oldest hormones, having been produced by life forms for over 750 million years.
  • The skin produces approximately 20,000 IU vitamin D in response 20Ė30 minutes summer sun exposure - 100 times more than the US government's recommendation of 200 IU per day!
  • Technically not a "vitamin," vitamin D is in a class by itself. Its metabolic product, calcitriol, is actually a secosteroid hormone that targets over 1000 genes in the human body.

Average Customer Review: 5 of 5 | Total Reviews: 50 Write a review.

  0 of 0 people found the following review helpful:
Vitamin D3 November 12, 2014
Reviewer: Vera H. from Warner Robins, GA United States  
I can tell the difference in my whole health since taking these vitamins.
More energy, better digesting

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  0 of 0 people found the following review helpful:
D3 September 22, 2014
Reviewer: Paul W. from Metairie, LA United States  
This product offers the proper mix of d and related nutrients.

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  0 of 0 people found the following review helpful:
D3 is lacking in the NW August 4, 2014
Reviewer: Marj B. from Seattle, WA United States  
Our sunshine isn't always shinning and most people in cloudy/rainy NW needs extra D3.  Helps with depression too.

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  0 of 0 people found the following review helpful:
Don't know how to rate. November 11, 2013
Reviewer: Anonymous Person from Urbandale, IA United States  
Doctor recommended I take this, so I do.

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  0 of 0 people found the following review helpful:
Best Price Online July 11, 2013
Reviewer: Lindsay T. from Coram, NY United States  
I always buy my D3 from here. It helps boost my immune system. I take one a day and get sick less often. Best price anywhere.

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