Lemon juice, whitening toothpaste, hydrogen peroxide with baking soda, denture cleaning tablets, and tea tree oil can whiten fingernails. There are many reasons why fingernails are not as white over time. Nail polish is the common reason for stained nails. Using a clear base coat before putting nail polish prevents your nails from staining over time. Smoking, chronic liver disease and fungal infection also affect your nail color.
Citric acid in lemon juice helps keep your fingernails white. Denture cleaning tablets contain citric acid and sodium bicarbonate which are good nail stain removers. Soaking fingernails in lemon juice or a mixture of two to three denture cleaning tablets and warm water for fifteen minutes should do the trick.
Whitening toothpaste contains hydrogen peroxide which helps whiten your fingernails. A mixture of one tablespoon of 3 percent hydrogen peroxide and 2 1/2 tablespoons of baking soda have the same effect on fingernails. Soak fingernails in this mixture for 3 to 4 minutes. Fran Manos, a nail expert and author of Beautiful Hands and Nails Naturally, recommends doing this for six to eight weeks for better results.
Tea tree oil is a natural antiseptic and fungicide. It is a perfect option for fingernail discoloration due to fungal infection. Mixing it with olive oil, a natural moisturizer, is also safe and highly recommended. Leave it on for a few minutes and rinse with lukewarm water.