2,000 IU 1 fl. oz. (29.57 ml), Item# 01732
|Units||Non-Members||Members (Not a Member?)|
Vitamin D3 can be synthesized by humans in the skin upon exposure to ultraviolet-B (UVB) radiation from sunlight. But, due to the winter season, weather conditions, and sun screen usage, the body’s ability to produce optimal vitamin D levels may be inhibited.1 These factors point to the value of taking a daily vitamin D supplement.
Vitamin D has long provided significant support for healthy bone density.2-7 However, scientists have also validated the critical role that vitamin D plays in regulating healthy cell division and differentiation, and its profound effects on human immunity.8-15 These findings link a deficiency of vitamin D to a host of common age-related problems.
The current RDA is only 600 IU. As a result of evidence of widespread vitamin D deficiency, prominent nutritional scientists are calling on Americans to increase their vitamin D intake to 1,000 IU per day and higher. Life Extension suggests that healthy adults supplement each day with at least 2,000 IU of vitamin D. Elderly adults may benefit from higher doses. The objective of taking a vitamin D supplement is to achieve an optimal 25-hydroxy vitamin D blood level of 50 ng/mL (or higher).
Vitamin D in the amount of 2,000 IU is contained in the multinutrient Life Extension Mix™ and the multivitamin Two-Per-Day Tablets. A vitamin D blood test can help you determine the additional amount of vitamin D you may need to supplement to achieve an optimal level.
Natural mint flavor has been added to Life Extension's Liquid Vitamin D3 for improved palatability.
1. Photochem Photobiol. 2007 Mar-Apr;83(2):459-63.
2. Rev Rhum Engl Ed. 1996 Feb;63(2):135-40.
3. Proc Nutr Soc. 2001 May;60(2):283-9.
4. J Bone Miner Res. 2003 Jul;18(7):1217-26.
5. Proc Natl Acad Sci USA. 2002 Oct 15;99(21):13487-91.
6. Steroids. 2001 Mar-May;66(3-5):375-80.
7. Bone. 2006 Oct;39(4):946-53.
8. Anticancer Res. 2012 Jan;32(1):223-36.
9. Cancer Lett. 2011 Dec 19. [Epub ahead of print]
10. Am J Prev Med. 2011 Jul;41(1):68-74.
11. Clin Rev Allergy Immunol. 2011 Feb 1. [Epub ahead of print]
12. Med Hypotheses. 2011 Dec;77(6):1145-7.
13. Dermatoendocrinol. 2011 Jan;3(1):11-7.
14. Mol Cancer. 2011 May 18;10:58.
15. Clin Rev Allergy Immunol. 2011 Feb 1. [Epub ahead of print]
|Dosage and Use|
The number of drops may vary based on temperature and altitude.
Individuals consuming more than 2,000 IU/day of vitamin D (from diet and supplements) should periodically obtain a serum 25-hydroxy vitamin D measurement. Do not exceed 10,000 IU per day unless recommended by your doctor. Vitamin D supplementation is not recommended for individuals with high blood calcium levels.