Eat plenty of raw, fresh, organic fruits and vegetables. These need not be your entire diet but should be the majority of what you eat. Junk the junk foods and avoid foods loaded with preservatives and chemicals. Find natural alternatives, improve your diet and lifestyle, and exhaust all possible alternatives before considering drugs. Get rid of all chlorine from your water supply.
Chlorine is a toxic, deadly chemical.
Chlorine also reacts with chemicals in the water to form strong cancer-causing compounds. Get filters for your sinks and shower so you don't touch or drink chlorinated water. For drinking, get spring water in glass bottles. Get natural, organic, and simple materials to clean your home and your body. Baking soda, white vinegar, old-fashioned plain soap and other natural things can replace the fancy but deadly chemicals we are used to.