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.
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.
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
recommends that healthy adults supplement each day with at least 2,000
IU of vitamin D. Elderly adults may benefit from higher doses such as
5,000 IU daily up to 10,000 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).
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 (available online or by
calling the Life Extension Blood Lab at 1-800-208-3444), can help you
determine the additional amount of vitamin D you may need to supplement
to achieve an optimal level.
companies offered only 400 IU
vitamin D products when Life Extension long ago introduced this 1,000 IU version. For
most people, this 1,000 IU potency is insufficient to attain optimal
vitamin D blood levels. For smaller individuals who obtain 2,000-3,000 IU in their
multi-nutrient formulas (and children), this potency of vitamin D may
Extension has upgraded its vitamin D capsules to a small, easy to
swallow softgel form that does not include allergen ingredients or