How to Overcome Dark Armpit?

Remedies for Dark Armpits

Rub lemon slices on your armpits.
Use alum powder instead of deodorants.
After a shower, rub some baking soda on your armpits.
Apply vitamin E oil on your armpits.
Wash your armpits with coconut oil.
Make a paste using 1 tsp of lime juice, 1 tsp of cucumber juice and a pinch of turmeric powder. Apply it on your armpits and rinse after 20 minutes.

This sounds like a character from a Star Wars parody.

Water and baking soda make a paste and put it on for about 5 minutes
Also lemon helps!