Category : D Vitamins

Vitamin D3

Price: 8.25

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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 block the bodys ability to produce optimal vitamin D levels may be inhibited. In fact it has been proposed that annual fluctuations in vitamin D levels explain the seasonality of influenza. All of these factors point to the value of taking a daily vitamin D supplement.Vitamin D has long provided significant support for healthy bone density.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. 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 startling evidence of a widespread vitamin D deficiency prominent nutritional scientists are calling on Americans to increase their vitamin D intake to 1000 IU per day and higher. Currently most experts in the field believe that intakes of between 1000 and 10000 IU for adults will lead to serum 25(OH)D levels above those indicative of vitamin D deficient levels at approximately 80 nmol/L or 32 ng/mL.Life Extension recommends that healthy adults supplement each day with at least 2000 IU of vitaminD. Elderly adults may benefit from higher doses such as 5000 IU daily up to 10000 IU daily. The objective of taking a vitamin D supplement is to achieve an optimal 25-hydroxy vitamin D blood level of 50 ng/mL (and higher). Life Extensions analysis of over 13000 vitamin D blood tests reveals that the minimum intake for most aging people should be around 7000 IU a day. Some individuals (such as those weighing over 180 pounds) may require higher potencies of vitamin D.

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