Fragile nails. As many people recognize, our bodies depend on the level of oxygen. Even such elements as nails rely on it. It means that the lack of the oxygen has an adverse impact on the fingernails: they turn dry and brittle due to the lack of elasticity. In addition, they become easy to break and split. The bed of the nails must generate new cells all the time to avoid this problem. Increase the amount of iron to get the solution!