It’s true that wearing dark shades of nail polish can stain your nails yellow. (Been there, done that!) That’s because there’s a reaction between the colorant and your nails
But even if you do stain your nails, they’ll return to their normal color when they grow out. Other than the staining issue, I’m not aware of any other problems caused by black nail polish. Also, I believe that other dark colors can cause staining, so it’s not just about black.
Mellow the Yellow
Yellow fingernails could be caused by an underlying medical condition, but smoking and regular use of nail polish can also cause discolored nails. Yellow fingernails really aren’t uncommon, but yellow fingernails really aren’t in fashion either. Smokers with yellow fingernails, and those who want to switch to sheer shades of polish insead of solid colors can successfully whiten discolored nails.
Denture tablets whiten and brighten dentures, and denture tablets can also whiten and brighten yellow fingernails. Simply follow instructions for dissolving denture tablets in water, and soak your nails for several minutes. Repeat the process until your nails are lighter and brighter in color.
Real Lemon Juice
Lemons are good for more than making lemonade and other sweet and tangy lemon treats. Real lemon juice can help whiten and brighten yellow nails. Slice open a fresh lemon, and squeeze the juice into a shallow bowl, or use reconstituted lemon juice. Soak your nails in the lemon juice for several minutes, and repeat this treatment as often as necessary. Wash and rinse your hands after treating, and apply lotion to replenish valuable moisture.
Lemon Essential Oil
If you want to moisturize your nails and cuticles while whitening yellow fingernails, try lemon essential oil. Simply pour your favorite lemon essential oil into a shallow bowl, and soak your fingertips for several minutes. Repeat this process whenever you need to whiten, brighten, and condition your nails.
Baking powder and vitamin E
You can also use baking powder and vitamin E gel tablet’s that you can pick up at your local drug store, pierce the tablet’s and squeeze the liquid out and mix it into a paste with the baking powder then massage it into your nails for about 2 minutes per nail and rinse it out. Do this once a day for about a week or more if needed and you’ll find that your nail will become whiter and the vitamin E will help moisturize your cuticles and nail beds.