subject: How much Vitamin D is too much? - Daily Proper Amount of Vitamin D Intake [print this page] Vitamin D has been viewed as to help bones health for long time, but new research also showed that insufficient Vitamin D amount also causes cancer, heart problems, severe asthma in children, cognitive impairment in adults. Vitamin D supplement sale has been up 127% in 2008, and 117% in 2009.
But you know Vitamin D can be very toxic if you intake high doses for a while. High doses (over 1000 Ius daily) will cause infant mental and growth retardation, kidney failure or even death. Over doses (over 50,000 Ius) will cause children and adult weakness, vomiting, mental changes, diarrhea.
Can our body make excessive amount of Vitamin D by exposing to sunlight? The answer is NO. Human body is well designed for us to survive. When you expose to the sunlight and your body has enough Vitamin D for daily usage, your auto Vitamin D making system will shut down. I have not heard any children have Vitamin D toxicity because of playing soccer under hot sun, and any adults have vitamin D toxicity by working under sun.
Can we intake excessive amount of Vitamin D by eating food ? The answer is NO also. Cooked salmon fillet (3.5 ounce) only contain 360 IUs of Vitamin D which is highest in fatty fishes. Drinking four glasses of fortified milk only give you 400 IUs of Vitamin D.
Where our body get toxic amount of Vitamin D? The answer is Vitamin D supplement. You need to watch out the vitamin contents on the label.
The current FDA's recommended daily allowance of Vitamin D is :
1. Children and adult younger than 50 years old - 200 IU per day.
2. Adult over 50 years old - 400 IU per day.
3. Adult over 70 years old - 600 to 800 IU per day.
Some experts in the field also think that the current FDA recommendation is too low, the number should be doubled.
How much Vitamin D is too much? - Daily Proper Amount of Vitamin D Intake
