Yellow nails are often caused by a fungal infection, especially if the nails become thick, brittle, or start to crumble.

"The decline in collagen can make nails more prone to breaking, peeling, and splitting." The good news is there's hope for these nail woes in the best nail strengtheners.

"Nail strengtheners help to prevent brittle and damaged nails and help the nail bed to stay healthy—if nutrients are incorporated in the formulation," says cosmetic chemist Ginger King.

Inside China's horrifying torture jails from gang-rape, human experiments and organ harvesting to inmates having nails ripped out and limbs bent back on notorious 'tiger chairs' ...

In turn, this can cause brittle nails, skin inflammation, and problems with hair growth. The general advice is for adults to get at least 7 hours of sleep per night.

The best press-on nails we've tested including long press-on nails, natural press-on nails, and long-lasting press-ons from Kiss and Elegant Touch.

SHOPPING: Designed to smooth and perfect the skin with all-day wear, the Benefit POREfessional Foundation is already being coined a 'new staple' for stunning skin - so I put it to the test.

Say goodbye to brittle nails! Expert tips for stronger, healthier nails ...