- If you take vitamin D supplements, do not take more than 25 micrograms (0.025mg) a day, as it could be harmful.
However, taking less than this is unlikely to cause any harm.
- Taking too many vitamin D supplements over a long period of time can cause more calcium to be absorbed than can be excreted.
- The excess calcium can be deposited in and damage the kidneys.
- Excessive intake of vitamin D can also encourage calcium to be removed from bones, which can soften and weaken them.
Yes, if you do not balance your cofactors there can be problems.
- Vitamin D is NOT a monotherapy
- Must reduce Calcium to 500 mg, Increase Magneium to 500 mg, and add Vitamin K2 to keep any excess Calcium from depositing in the arteries, etc.
- By the way: 2013 study found that Vitamin D does NOT cause kidney stones.
- Institute of Medicine 4,000 IU upper limit without doctor
- Endocrine Society 10,000 IU when needed
- Sun provides > 10,000 IU daily
- Henry Lahore, admin of VitaminDWiki, and about a million other people take >5,000 IU daily
- 1000 IU of vitamin D (per kg) can indeed be toxic – 1947
Note: Some medical textbooks in 2010 still stated that >1,000 IU of vitamin D could be toxic
- 10,000 IU vitamin D daily is safe, toxicity start at 150 ng (for monotherapy)– Jan 2013
- Why the UK government ignores evidence for the benefits of Vitamin D - Nov 2013
- Overview Toxicity of vitamin D which has the following graphic
short URL = https://is.gd/1000IU