> Warm showers can lower stress, and if the bath isn't too warm, it's effective, too; if the bath raises the body temperature, that can cause the metabolism to increase, sometimes causing low blood [[sugar]]. > A sauna or hot bath, by increasing your metabolic rate, can quickly deplete the glycogen in your liver, causing hypoglycemia. If you eat [[protein]] without enough [[sugar]] or other carbohydrate it can cause hypoglycemia, too, so it's important to have lots of orange juice and [[milk]], for frequent snacks. > [Jacuzzi and hot tubs] Getting the body temperature too high can deplete glycogen and lower blood glucose, sometimes causing fainting, probably why people occasionally drown in hot tubs; high temperature can damage the testes, reducing sperm production. > [Fluoride in showering/bath water] I don't think it's a problem. The soaps and shampoos people use are worse problems. Just washing the [[skin]] with pure soap alters the [[skin]]'s endocrine function for days. and doing it every day is an "endocrine disrupter," even if there are no toxic additives in the soap. > [Shower with a little instant coffee: feeling, looking better] Some [[caffeine]] can be absorbed through the [[skin]], but [[caffeine]] is a diuretic, so you probably aren’t absorbing enough. Do you drink coffee with your meals? [Yes. I still don’t know what it is doing in my body.] It might be from the cafestol and kahweol—they are fat soluble and well absorbed by the [[skin]].