The Vitamin D Council advises that most healthy people can receive 5,000-10,000 IU of vitamin D3 a day without harm. But high dose vitamin D must be accompanied by sufficient calcium and magnesium…and people with certain diseases should only take supplements under the supervision of a knowledgeable doctor. Vitamin D is essential for the absorption of calcium and the prevention of osteoporosis. Recent studies have shown that it may also boost the immune system and help to prevent cancer.
Our body will automatically regulate how much vitamin D it produces from sunshine. Studies show that sunbathing in the summer for about 30 minutes can result in the production of over 10,000 IU of vitamin D and that once our skin makes about 20,000 IU, the ultraviolet light begins to degrade the vitamin so that we do not “overdose” on the sun. Vitamin D expert Dr. Vieth reports that there is no practical Ibutamoren MK677 sarm difference between vitamin D acquired from the sun and that acquired from food and supplements.
The Vitamin D Council reports that doses of 5,000 IU per day from all sources (sun, diet and supplements) are safe for most healthy people and that there are no reports of toxicity up to 10,000 IU per day. But the Council also warns that without calcium and magnesium in sufficient quantities, vitamin D supplementation will withdraw calcium from the bone and will allow the uptake of toxic minerals. As everyone metabolizes vitamin D differently, the best way to identify the optimal level of supplementation is to adjust the dosage to maintain target blood levels. The Vitamin D Council recommends that optimal health is supported by blood levels of 50-80 ng/mL (125-200nmol/L) as identified in a 25(OH)D vitamin D blood test.
HIGH DOSE VITAMIN D FOR TREATMENT OF SEVERE DEFICIENCY
High dose vitamin D treatment is broadly accepted in the medical community for people who are suffering from a severe deficiency but are otherwise in good health. There are two views on the best way to receive high dose vitamin D. The most common form of high dose vitamin D in the US is a prescription form of ergocalciferal also known as vitamin D2. But as vitamin D2 is less potent than vitamin D3, many doctors now recommend high dose vitamin D3 which can be purchased in a health food store or on-line.