Vitamin D is synthesized in the body from sunlight. But, due to the winter season, weather conditions, and sun block, the body's 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 400 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 1,000 IU per day and higher. Currently, most experts in the field believe that intakes of between 1,000 and 4,000 IU for adults will lead to a more healthy level of serum 25 HD, at approximately 75 nmol L.

Life Extension recommends that healthy adults supplement each day with at least 1,000 IU of vitamin D. Elderly adults may benefit from higher doses such as 2,000 IU daily up to 7,000 IU daily.

References Supplement Facts Serving Size 1 drop 35.2 mg Servings Per Container approximately 975 Amount Per Serving Vitamin D3 as Cholecalciferol 2000 IU Other ingredients: vegetable glycerin, deionized water. This product contains NO milk, egg, fish, peanuts, crustacean shellfish lobster, crab, shrimp, soybeans, tree nuts, wheat, yeast, gluten, corn or rice. Contains NO sugar and no artificial sweeteners, flavors, colors, or preservatives. Dosage and Use

Take one drop daily with a fat containing, low fiber meal, or as recommended by a healthcare practitioner. Note The number of drops may vary based on temperature and altitude.

Caution 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 hypercalcemia high blood calcium levels. People with kidney disease, certain medical conditions such as hyperparathyroidism or sarcoidosis, and those who use cardiac glycosides digoxin or thiazide diuretics should consult a physician before using supplemental vitamin D. Life Extension Vitamins



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