7-Dehydrocholesterol has significant absorption of UV light at the lowest wavelengths of light found in sunlight (290-310 nm). Hence the need for full-spectrum lamps to emit UV-B radiation (UV-B light is defined here to be light between 290-315 NM).
In rare cases some vegans might not get enough fat or calories to produce adequate amounts of steroid hormones (which are produced from cholesterol). Two studies have shown vegans to have sex hormones on par with meat-eaters (1, 2), but one report showed vegan women to have lower levels of estrogen (3).
A vegan diet can be healthyâprovided you do it right. But itâs not for everyone, and can be unhealthy if your vegan choices are mostly carbohydrates and sugars. Here are some good reasons to go vegan, and some good reasons not to. 7 Reasons to Go Vegan. 1  You want to reduce your risk for colon cancer.2  Research shows that people who eat less than one ounce a day of red meat cut their colon cancer risk by about one-third compared to people who eat five ounces or more a day. Reasons to Go Vegan. 1  You want to reduce your risk for colon cancer. 2  Research shows that people who eat less than one ounce a day of red meat cut their colon cancer risk by about one-third compared to people who eat five ounces or more a day.