Brain tumor research is a relatively modern science that parallels the explosion of molecular biology and modern neuroimaging. While the science is new, Mayo Clinic has a long history of brain cancer treatment and research stretching back over 100 years.
But not all vitamins are water-soluble, and the ones that are lipid-soluble, meaning they like to hang around in your body's fat, don't get flushed out. Instead, if you take too much of a lipid-soluble vitamin over a few weeks to a month, they sit in the liver and can build up to toxic levels, causing problems ranging from weak bones to liver damage, according to Katherine Zeratsky, a registered dietician nutritionist at the Mayo Clinic.
For a number of reasons, many people arenât getting enough vitamin D to stay healthy. This is called vitamin D deficiency. You may not get enough vitamin D if: 1  You donât get enough sunlight. 2  Your body is usually able to get all the vitamin D it needs if you regularly expose enough bare skin to the sun.3  However, many people donât get enough sunlight because they spend a lot of time inside and because they use sunscreen.ou may not get enough vitamin D if: 1  You donât get enough sunlight. 2  Your body is usually able to get all the vitamin D it needs if you regularly expose enough bare skin to the sun. 3  However, many people donât get enough sunlight because they spend a lot of time inside and because they use sunscreen.