Guest guest Posted December 10, 2008 Report Share Posted December 10, 2008 Just how much vitamin D does a Caucasian mowing the lawn in shorts and a T shirt get in two hours on a summer day? If 2000 IU is dangerous, why do not lots of people suffer dire consequences from moderate sun exposure? Alobar, according to the researchers at the conference, if you are exposed to the sun's UVB rays for a long time, your body will reach a plateau and not increased it's vitamin D conversion to toxic levels. You will burn your skin, but not increase vitamin D beyond a maximum level needed. If you are out mowing your lawn in shorts and a T shirt, all you need is about 15 minutes on a summer day to make about 20,000 IU, but if you are in a northern latitude, even in summer, you will make less. People with darker skin take longer to make vitamin D in the sun... and take longer to burn. They also have more melanoma than caucasian skin, because they don't make as much vitamin D readily. It's the vitamin D that actually protects the skin against the cancer. People who live in northern latitudes, such as Norway and Finland are very fair skinned so that their skin will absorb more of what little sun reaches that far. Also, people who are overweight also need more vitamin D supplement because the vitamin settles out in the fatty tissue and is not available for the body to use in the cells. So many obese people are deficient even if they sunbathe often. BTW, you must really have a big lawn if it takes you two hours to mow! Marji Quote Link to comment Share on other sites More sharing options...
Guest guest Posted December 11, 2008 Report Share Posted December 11, 2008 Exactly what I was getting at! If mowing the lawn can give on 20,000 IU of D, I sure am not worried about taking too much D. I'd have to drink a cup of cod liver oil daily to reach 20,000 IU. From what I have read, vitamin D overdose is generally between 50,000 to 150,000 IU per day. If I drank that much cod liver oil, I probably would be puking and pooping it long out before enough D got absorbed into my blood to cause a vitamin D overdose. When I was a kid, the lawn took most of 2 days to mow with a small tractor. As an adult, when I lived in the country, my lawn took several hours to mow. Now I live in an apartment, so no lawn mowing for me!. Alobar On 12/9/08, Marjij <marjij wrote: > Just how much vitamin D does a Caucasian mowing the lawn in shorts > and a T shirt get in two hours on a summer day? If 2000 IU is > dangerous, why do not lots of people suffer dire consequences from > moderate sun exposure? > > > Alobar, according to the researchers at the conference, if you are > exposed to the sun's UVB rays for a long time, your body will reach a > plateau and not increased it's vitamin D conversion to toxic levels. > You will burn your skin, but not increase vitamin D beyond a maximum > level needed. If you are out mowing your lawn in shorts and a T > shirt, all you need is about 15 minutes on a summer day to make about > 20,000 IU, but if you are in a northern latitude, even in summer, you > will make less. > > People with darker skin take longer to make vitamin D in the sun... > and take longer to burn. They also have more melanoma than caucasian > skin, because they don't make as much vitamin D readily. It's the > vitamin D that actually protects the skin against the cancer. People > who live in northern latitudes, such as Norway and Finland are very > fair skinned so that their skin will absorb more of what little sun > reaches that far. > > Also, people who are overweight also need more vitamin D supplement > because the vitamin settles out in the fatty tissue and is not > available for the body to use in the cells. So many obese people are > deficient even if they sunbathe often. > > BTW, you must really have a big lawn if it takes you two hours to > mow! > > Marji > Quote Link to comment Share on other sites More sharing options...
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