Life Extension, Vitamin D3 (with Sea-Iodine) 5,000 IU 60 Capsules

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 body?s ability to produce optimal vitamin D levels may be inhibited. 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 1,000 IU per day and higher. Currently, most experts in the field believe that intakes of between 1,000 and 10,000 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 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 between 50-80 ng/mL. The algae found in Sea-Iodine come from the pristine waters of Iceland and Nova Scotia, providing you with over 667% of the Recommended Daily Value of natural iodine. Iodine is a health-promoting trace element essential for life. Its primary biological role lies in the production of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). T4 and T3 contain four and three atoms of iodine per molecule, respectively. The thyroid gland actively absorbs iodide from the blood to make and release these hormones into the blood.

Vitamin D (as cholecalciferol), Natural Iodine from Sea-Iodine Complex Blend, Nova Scotian Kelp (Ascophyllum nodosum), Icelandic Kelp (Laminaria digitata), Nova Scotian Dulse (Palmaria palmata), microcrystalline cellulose, vegetable cellulose (capsule), maltodextrin, modified food starch, vegetable stearate, silica. Due to the source of the kelp, this product may contain fish and shellfish.

Take one capsule daily, or as recommended by a healthcare practitioner. This product is best utilized when taken with fat-containing, low fiber meals.