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).
When in doubt, look for basic causes first, such as a fungal infection, a reaction to nail polish or bruising from an impact. There's ongoing debate about whether brittle nails are caused predominantly by a lack of protein or moisture in the nails.