Have you tried using a glass nail file, instead of the traditional kind? My nails used to split and peel too, but since i switched to the glass nail file I haven't had any peeling. Filing in just one direction, instead of back and forth helps too.

I have had the same problem ever since I started painting my nails every other day. I would suggest Nailtiques Formula 2 nail treatment- it's like a strengthening base coat. It's expensive, about $20 for a full bottle and $10 for a small bottle, but I swear by it! It completely resolved my nail weakness. Now I have super hard nails that never peel. When the bottle gets low and gunky, I just use a nail polish thinner.

Pink Armor Nail Gel (now on sale online at Walgreen's for a mere $7.99) provides the lovely look of a French manicure, but keratin in the formula prevents discoloration and strengthens nails, stopping them from peeling, breaking, and splitting. I just discovered this jewel!

My nails peel too. I haven't found any "magic" product though but they seem to peel less if I keep them very moisturized. No one nail/cuticle oil seems any better than the others although I really do like Burt's Bees Lemon Butter Cuticle Cream. I have had some pretty good results with putting regular olive oil in a small shallow bowl, microwaving it till its warm and then soaking my nails and cuticles in it. I also try to keep a clear coat of strengthener on them in the winter and that does help some.

I don't have an issue with my fingernails except they get damaged from working with a lot of products. My toenails all of a sudden have been bad for the last year or so. It can mean a deficiency in your diet and long ago they used to say to have gelatin. I tend to not want that, but if it continues I may try other things. When you say peeling, what would you exactly mean /brittle too. I have been using nightime deep facial moisturizers recently on the skin surrounding it because that was affected too.

Try a supplement like biotin.

The ladies before me have given stellar advice. Be sure to use a good shield on them all year long; nails are weakened by any exposure to water (I used to have problems with my nails peeling and tearing after taking a shower!). You are already moisturizing. The suggestion about the glass nail file in one direction is excellent. Take a very potent B Vitamin complex which contains Biotin. Your skin, hair, and nails will benefit. My nails used to peel. Now that I take vitamins (especially B) and treat them well, I have to actually keep trimming them to be able to type!

HeathRene, great suggestion!