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.
Vitamins come in two forms: water-soluble and fat-soluble. The water-soluble vitamins are vitamin C and the B-complex vitamins. If you take in more than your body can use of these, they end up passing through you as expensive urine. Vitamins A, D, E and K, on the other hand, require fat to dissolve. Your body stores these vitamins, and if you take too much, the amount in your body can build to a harmful level. Tolerable Upper Intake Levels The highest amount of a vitamin you can safely take per day is known as the tolerable upper intake level, or UL.
Keep in mind, though, that many diet supplements have vitamin D, so before you take another one, check the labels and let your doctor know what youâre taking. Getting too much vitamin D, especially above 4,000 IU per day, can be dangerous. If you already have osteoporosis, keep in mind that vitamin D and calcium alone are not enough to treat the disease. Youâll need to take them along with other medications your doctor prescribes.