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Vitamin D3

Rejuvenation Therapeutics


  • Preferred form of vitamin D. Supports teeth, bone, and immune health.*
  • Aids in calcium absorption in the body.*

Suitable for Vegans. Gluten Free. No artificial fillers, No Rice.

1000IU/4000IU/5000IU • 60 Vegan Capsules (2-Month Supply).


Suggested Use: Take 1 capsule per day with a meal or as directed by your qualified healthcare professional.

Warning: Consult a healthcare professional prior to use if you are pregnant or nursing, taking any medications or have any medical conditions. Keep out of reach of children.

Store in a cool, dry place.

What is Vitamin D3?

Vitamin D3, also known as cholecalciferol, is a potent form of vitamin D that our bodies naturally produce when exposed to sunlight. It is the form of Vitamin D that is most beneficial to humans. Despite its name, vitamin D is actually a hormone. When ultraviolet B light hits our skin it produces a vitamin D precursor, which then undergoes two conversions in the liver and the kidneys before reaching its active form, Calcitriol. This active hormone regulates levels of calcium and phosphorous in the body and is thus vital to bone health. Due to the very limited amount of foods containing vitamin D (fatty fish, cod liver oil, egg yolks, fortified milk), most people rely sunlight exposure as a source of the vitamin. The amount of vitamin D available through sunlight exposure, however, is dependent on several factors including: sunscreen use, time of day, time of year, location, age, and skin pigmentation. A recent report suggested that about 88% of the worlds population has sub-optimal levels of Vitamin D (<75nmol/L).[1] Supplements is therefore important and can be a convenient, reliable source of vitamin D for those who struggle to obtain adequate amounts from their diet or sun exposure.

What are the benefits of Vitamin D3?

Vitamin D3 plays a critical role in bone health. It supports the growth and maintenance of bones by enabling efficient absorption of Calcium in the small intestine. In fact, without adequate levels of vitamin D, the body absorbs only 10-15% of dietary Calcium.[2] Studies have shown vitamin D intake to be associated with decreased risk of stress fractures, while vitamin D deficiency is associated with rickets in children and osteomalacia, osteopenia, and osteoporosis in adults.[3-5]

More recently, research is building to suggest that vitamin D’s role in health extends far beyond our bones. Several studies now suggest that low levels of circulating vitamin D are associated with numerous diseases, including cancer, autoimmune diseases, cardiovascular diseases, and infections.[6-9]

Why take Vitamin D3 supplements?

Supplements serve as a convenient option for anyone looking to increase their vitamin D intake. The daily recommended intake from the Food and Nutrition Board is 600 IU/day, while the Vitamin D Council and Endocrine Society recommend higher doses (1,500-5,000 IU/day). Some populations whom supplements may be especially beneficial for include: people living in areas with little sun exposure, people who regularly wear sunscreen, people following a vegetarian or vegan diet, people with darker skin pigmentation, and people older in age.


  1. Holick, Michael F. “Vitamin D deficiency.” New England Journal of Medicine 357.3 (2007): 266-281.]
  2. Lappe, Joan, et al. “Calcium and vitamin D supplementation decreases incidence of stress fractures in female navy recruits.” Journal of Bone and Mineral Research 23.5 (2008): 741-749. (MAKE #2)
  3. Sonneville, Kendrin R., et al. “Vitamin D, calcium, and dairy intakes and stress fractures among female adolescents.” Archives of pediatrics & adolescent medicine 166.7 (2012): 595-600. (MAKE #3)
  4. Hilger, Jennifer, et al. “A systematic review of vitamin D status in populations worldwide.” British Journal of Nutrition 111.01 (2014): 23-45. (MAKE #4)
  5. Khazai, Natasha, Suzanne E. Judd, and Vin Tangpricha. “Calcium and Vitamin D: Skeletal and Extraskeletal Health.” Current rheumatology reports 10.2 (2008): 110–117. Print. (MAKE #5)
  6. Holick, Michael F. “The vitamin D epidemic and its health consequences.” The Journal of nutrition 135.11 (2005): 2739S-2748S. (MAKE #6)
  7. Hilger, Jennifer, et al. “A systematic review of vitamin D status in populations worldwide.” British Journal of Nutrition 111.01 (2014): 23-45.(MAKE #7)
  8. Martineau, Adrian R., et al. “Vitamin D supplementation to prevent acute respiratory tract infections: systematic review and meta-analysis of individual participant data.” bmj 356 (2017): i6583.


* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.