I'm a 61 year old working full time married woman and I've been a Melaleuca customer for at least 9 years. I have faithfully used the vitamins for my age group. I very rarely get sick. I work at a college and am surrounded by staff and students, and when one gets the flu or a cold, it spreads like wild fire. I take the vitamins every day, not once a week, or when I remember, but every day. I know they also make a big difference in my energy level. I can't recommend them highly enough.