Turmeric Powder and Lime Juice You can find turmeric powder in the spice section of your local grocery store. To use it to lighten your skin, form a paste using a teaspoon of turmeric powder and the juice of half a lime. The paste should be easy to apply to your face – if you need it a bit thinner, just add some more lime juice. The turmeric can stain so it is best to do this in the bath. Leave on your face for up to 30 minutes and then wash off with plain water. If the mixture leaves your face a bit yellowish, don’t worry as it’s just the stain of the turmeric. If you apply the paste at night, by the morning the stain will be gone. You will discover a more even skin tone after a 3-4 weeks of daily use.