I have been using this product for many years, being highly recommended by my family physician. Yes, a docter, and not an alternative healer! I had chemo treatment for my cancer 10 yrs ago, and my immune system was really down. My doc introduced me to RM-10 as an effective immune booster. Sure enough, after taking it for a few months, i felt a lot healthier and I hardly contacted the flu even when mingling with people with very bad flu. I have been using it since then.