For an effective lightening mask mix 3 tbsp baking soda, 1 tbsp turmeric, 1/4 cup of heavy whipping cream, 2 tbsp of honey, 1 squeezed lemon. Stir it well.
Apply it to your underarms with the back of a spoon. Turmeric will stain your clothes, hands.
Leave it for 10 minutes and wipe off afterwards. Repeat for 3 days to see the result.