Losing weight to quickly can result in serious health issues. You will start to put on more weight than losing any if you loose weight way to fast. Nail,hair,and skin loss are all part of losing weight too quickly. I hope this really helps
7 days a week is recommended for any age to be hygienic but that's should you could never shower i guess i mean it's your choice but don't do that 6-7 is healthy or "normal"