3.2 RESEARCH DESIGN Burns and Grove (2003:195) define a research design as âa blueprint for conducting a study with maximum control over factors that may interfere with the validity of the findingsâ.
MotherNature.com states that weak nails can mean there are problems elsewhere in the body. Psoriasis, a condition of the skin that can lead to itching, can cause weak nails. Hyperthyrodism, which is an overactive thyroid gland, can also cause weakness. Anemia may also contribute to weak nails. In addition, it can signal a calcium deficiency.
While these white spots may be the result of a zinc deficiency, it is likely that other signs of zinc deficiency, such as hair loss or a slow immune system, would be present as well. Occasionally, a few white spots on fingernails may indicate an allergic reaction to a product used on the nail, such as nail polish, hardener, or polish remover.