Saturday, 2 May 2009
Vitamin D Supplements
For a long time now I have been taking Cenovis multivitamin tablets. Each one of these tablets contains 200IU of vitamin D3. I have recently read that scientists are starting to believe that 200IU per day of vitamin D (the amount recommended by the U.S. government) is not enough. Many scientists now believe that 1000IU of vitamin D3 per day should be the new recommended intake.
I began recording my vitamin intake from November last year (2008). At around April of this year (2009) I started taking pure vitamin D3 supplements (Oste-Vit-D) in addition to my normal Cenovis multivitamins. Since I take both Oste-Vit-D and Cenovis multivitamins, this means I get 1200IU of vitamin D3 per day. However, because I don't always remember to take these tablets every day, I am confident my intake of vitamin D3 will average out to about 1000IU per day from now on. My graph below confirms it. It shows how much total vitamin D3 supplements I have taken since November last year.
Many people are curious to know why I take vitamin D supplements. They tell me that spending time in the sun gives enough vitamin D. Spending time in the sun can give you vitamin D, but spending time in the sun also increases the risk of skin cancer. Many people laugh at me because I have dark skin. They claim that because I have lots of melatonin in my skin that I have lower risk of getting skin cancer. That is true. However, just as dark skin reduced the probability of getting skin cancer by blocking UV rays, it also reduces the ability the body has to synthesize vitamin D from sunlight since UV rays are necessary for vitamin D synthesis. Hence skin darkness is irrelevant.
Further Reading: Skin Color Matters in the Vitamin D Debate