It is well-known that tannins from green tea or persimmon are
effective in removing body odor, detected mostly for the elderly
people , and soaps
containing the tannins are also commercialized by several companies in USA and Japan. Personal body odor is affected by various
environmental and internal factors, such as gender, age and eating
habits . Among the odor substances, trans-2-nonenal is known to be generated with aging, and characterized
as the key component of the body odor in the elderly people