Like many wellness and health regimens, people respond differently. Many people will notice a positive effect in just in one session, however, a series of sessions is recommended for optimal results. Some people come 2-3 times a week for a 3-4 week ritual during allergy and cold seasons, some people come 2 times a week for 6-8 weeks for more chronic conditions. Those who come for general wellness, stress relief, and relaxation simply come as often as they like. For many conditions, after a series of sessions, symptoms subside and relief can last for several months before another session is needed. It can also be used as a preventative measure to strengthen the immune system against colds, cough, allergies, and sinusitis. You cannot overdose on salt therapy.