The human body can produce and emit a special odor, which is called body odor. Body odor varies from person to person, from gender to gender, from age to age and from health to health, such as the “milk smell” of infants and the “old man smell” of the elderly. In general, body odor will change with age and gradually aggravate, many elderly people and relatives are troubled by this. Simple topical perfumes and deodorant products may not be effective in removing these body odors, but only through a reasonable diet, regular life, good hygiene habits to regulate and pay attention to the health of the elderly, in order to truly reduce and improve the “annoying” body odor.