We always heard about people who consume calcium supplement nails are harder and actually notice an improvement in them. Probably the origin of this idea or impression is influenced by the belief that nails a high concentration of calcium but this does not exceed 0.03%.
Calcium in bone is present between 20 and 25% depending on age. Calcium is essential to maintaining total body health. Your body needs it every day not only for strong bones and teeth, but also to ensure proper functioning of muscles and nerves.The teeth and bones contain about 99% of body calcium and calcium-dependent both in terms of its strength and its structure. The remaining 1% circulates in the blood and even helps blood clotting.
This does not appear that a direct impact on your nails, but the truth is that your body if and therefore also indirectly influences strengthen your nails.
The important thing is to have a balanced diet in calcium for several reasons, provided calcium is good for our bones and more older, maybe have to take any supplement if your body needs.