Ключевые слова: abnormal, aging, background, beauty, brittle nails, calcium, caucasian, close up, coarse, condition, cuticle, defect, deficiency, diet, disease, diseases, eczema, female, finger, fingernail, health, horizontal, human, line, lines, lunula, mineral, nail, problem, protein, ridge, ridged, ridges, short, short cut, sign, surface, symptom, thumb, thyroid, uneven, unhealthy, unrecognizable, vertical, vertical lines in fingernails, vertical ridges, vitamin, warning of a health, white,