Home > Quick Orders >

Vitamin D3, 1,000 IU, 120 Veg Caps

Alternative Views:

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.
Capsule Size: 4C
Retail $12.99
Our Price $2.98

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 sun’s ultraviolet (UV) rays. UV rays promote the skin’s 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 cell’s “job” 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 body’s innate immune response as well as supporting appropriate autoimmune activity. Both these mechanisms are thought result from vitamin D’s 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 20–30 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: 4.5 of 5 Total Reviews: 27 Write a review.

  0 of 0 people found the following review helpful:
D3, October 18, 2017
Reviewer: Gail M. from Albany, NY United States  
Just as expected

Was this review helpful to you?

  0 of 0 people found the following review helpful:
D3 in rainy Seattle March 17, 2017
Reviewer: Marj B. from Seattle, WA United States  

Was this review helpful to you?

  0 of 0 people found the following review helpful:
Saving for summer use!! December 21, 2016
Reviewer: Wayne from Columbus, OH United States  
Will use in the summer when less is needed by the body due to the summer sunshine.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
Vitamin D3 November 22, 2016
Reviewer: Paul H. from New York, NY United States  
The price for the vitamin D3 was very reasonable.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
Great product November 25, 2015
Reviewer: Heather D. from Indianapolis, IN United States  
I love your D3, but I wish you had a 3,000 IU product in one capsule.  I feel like 5000 daily might be a little high, especially in the summer.  And 1,000 IU is not enough - I'd like to have a 3,000 IU for winter months.

Was this review helpful to you?

View All Customer Reviews

Browse for more products in the same category as this item:

Quick Orders
All Products
Bones and Joints
Anti-Aging/Cellular Health