If needed, take digestive enzymes. Also helpful are kelp, biotin, and lecithin. A short fast is a good way to begin the program. Then begin eating only nutritious foods. This frequently helps.
Shampoos containing selenium sulfide can cause eye damage and hair loss.
Plain water alone is also good. Pour warmed vinegar over the head, wrap in a towel, and wash off 30 minutes later. A little sunlight is good for your scalp and hair. Keep calm and relaxed. It will help your hair.