Physical education is a unique aspect of education in that it provides the only. instruction for students in the development and maintenance of positive attitudes, essential knowledge and physical skills. The contribution of physical education is to.
1 Kidney disease can cause a build-up of nitrogen waste products in the blood, which can damage nails. 2  Liver disease can damage nails.  Thyroid diseases such as hyperthyroidism or hypothyroidism may cause brittle nails or splitting of the nail bed from the nail plate (onycholysis).
Estrogen, among its other functions is responsible for the moisture retention in the body. Less estrogen causes the skin to dry. Moisture: soaking the nails in water softens the keratin. If you work requires you to have wet hands, it is probably the main cause of your brittle nails. For the same reason, biting nails causes brittle nails. The nails are touched by saliva many times during the day and remain moist most of the time.