LogFAQs > #896248901

Shampooing is not a requirement for human beings. It's more of a cosmetic deal, and I do it once a week, if that.

People have this perception that shampoo is like soap and its not. It's a de-greaser, basically. It's designed to strip your scalp, which, strips it of any possible surface dirt, impurities, or dandruff. But you can rinse out surface dirt and the like with a normal water rinse. Shampoo takes out that stuff AND your natural scalp oil. When that happens, your scalp will reproduce what the shampoo takes away.

I only shampoo once since I live in Chicago where the winter can really dry out skin. But if you live in a consistently warm climate, I wouldn't shampoo more than once a month.

I can't comment on pot/cig smokers, though.