I have been trying to lighten my dark underarms for the past few months & nothing is working for me! I have tried Retin A but the results aren't drastic ...I heard lemon works to lighten dark areas but it didn't work for my underarms either..I am now going to try lactic acid peel 50% for my underarms. Would this be too much for my skin to handle? If not, how many times & how long should I put the lactic acid on my underarms? If yes, what other alternatives could I do?