To whiten the underarm while deodorizing, try utilizing white baking soda. White baking soda works as a lightening scrub for the underarms, and also enables you to use an alternative to skin-darkening antiperspirants and deodorants. Baking soda itself kills germs to prevent odor.
To apply baking soda as an underarm lightener, mix it with water to form a scrub.
Saffron is another natural remedy for dark underarms. Mixed with milk to make a paste and left on overnight or for at least 15 to 20 minutes, it whitens underarms while killing odor-causing bacteria.
Most deodorants and antiperspirants actually cause underarms to darken, which is why natural remedies are more beneficial.