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.
Vitamin B-12 of the B vitamin complex strengthens nail growth; therefore, a deficiency in B vitamins may cause fingernail ridges. Iron deficiency causes ridges in the fingernails usually accompanied with white spots; Koilonychia is a condition associated with iron deficiency.