Melatonin is useful for treating some forms of cancer, like breast cancer, but I also saw someone suggest women wearing bra's increase the risk of breast cancer

Melatonin is useful for treating some forms of cancer, like breast cancer, but I also saw someone suggest women wearing bra's increase the risk of breast cancer, possibly due to the restrictions placed on the lymph nodes under the arm pit. Moving and exercising to flush/pump the lymph around the body to the nodes which are all pretty much located where folds in the body occur, ie pits, groin, backs of knees and so on seems to be the way this works. Bra's restrict the circulation under the pits, hence the increase in breast cancer, but not the only factor as seen with women doing late nights, more alcohol and drugs compared to a generation ago. Lymph seems to be a passive system ie its not pumped like blood is. Melatonin is good for a variety of reasons which is probably why its called beauty sleep, its also one of the few substances that can cross the blood brain barrier like caffeine does, and that in turn increases dopamine.