Participation of this trace metal in all major biochemical pathways and formulation of genetic material such as DNA transcription, RNA translation and cell division is well documented 1. Institute of Medicine of the National Academies (formerly National Academy of Sciences) supports Food and Nutrition Board (FNB) for the formulation of Dietary Reference Intakes (DRIs) for zinc 3. Severity of zinc deficiency is characterized by skin and eye lesions, hair loss, male hypogonadism, impotence and delayed sexual maturation (Prasad, 2004). When zinc is administered in high quantities it can lead to acute effects such as headaches, nausea, and diarrhea, loss of appetite, vomiting and cramps in abdomen 4. Elemental analysis of trace metals is achieved through atomic fluorescence spectrometry, atomic absorption spectrometry, inductively coupled plasma atomic emission spectrometry (ICP-ALS) 6. Healthy cells influence their roots and transient concentrations are offered by fluids and blood therefore nails serve as a beneficial biomarker of concentrations of trace elements 7. The general health status of the welders was assessed by means of a questionnaire related to their personal profile, general health, dietary habits, life style, age and gender, source of drinking water, smoking habits, health condition and medication. b) Instrumentation: For flame atomic absorption analysis of zinc (Zn) in nails, Atomic Absorption Spectrophotometer (AAS Thermo scientific M series GF95Z Zeeman Furnace) was used. c) Washing of nail samples: After analysis, the concentration of zinc in nail certain factors (age, sex, health, occupation, etc.) causing the change in zinc levels is obvious, whereas the influence...