A.T.
No, 7 1/2 is not too young. Get one that does not contain aluminum! Watch the wording close: some have aluminum but don't use the actual 'word' aluminum in the active ingredients; such as GLY, GLY anhydrous, zirconium trichlorohydrex, zirconium pentachlorohydrex. Arm and Hammer, Tom's and Suave MEN are some I know are aluminum free.