HUMAN NUTRITION

Detailed explanation-1: -Bump that washing time up to 20 seconds, water use climbs to nearly three-quarters (. 75) of a gallon. Many experts advise people scrub their hands for at least 20 seconds to achieve a thorough cleaning.

Detailed explanation-2: -If you are doing it right, 20 seconds allows for enough time to be thorough, and for soap molecules to do their job on the entire hand. “It takes time to clean all those surfaces effectively, ‘’ Gilbert says. “If you try to do it in half that time, you’re probably not going to effectively clean all of them.”

Detailed explanation-3: -Nonetheless, evidence suggests that washing hands for about 15-30 seconds removes more germs from hands than washing for shorter periods 15, 17, 18.