answer:Your hair probably won’t lighten much at all from lemon juice. This works best on hair that is naturally light, and really only if you intend to sit out in the sun. Even then the results are minimal. You should really have your hair professionally highlighted if you’ve never had highlights before. To lighten your nails, try dipping a q-tip in some hydrogen peroxide (most people have it in their medicine cabinet), and running it under the edge of your fingernail a few times. Repeat until your nails are the desired lightness.