HUMAN NUTRITION

Detailed explanation-1: -Wet your hands with clean, running water (warm or cold), turn off the tap, and apply soap. Lather your hands by rubbing them together with the soap. Lather the backs of your hands, between your fingers, and under your nails. Scrub your hands for at least 20 seconds.

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: -In a six-second hand-wash, that will use up just less than a quarter gallon (0.22) of water. 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.