Nail Strengthening Oil

What are nails? Nails are proteins whose structure is similar to that of the hair. They grow in their top end where under the soft arched cuticles new cells are formed. They "shove" down the nail constantly renewing it. Normally, when the organism is in a healthy state, they grow about 4mm monthly. Biting the nails, tearing the cuticles as well as stress, can stimulate the nails' growth. And