How to increase wight and height in males n also females?

Limited. Grown-ups won't gain height despite a variety of scams offering this. Tall is a plus for a man, but people will be far more impressed by a man with a lean, muscular body, and any man can do this by lifestyle changes focused on diet and aerobic and resistance training. It's most important for a woman to have a little body fat, but not too much, to look and be healthy. There is no magic best weight.