Fig. 1
From: Age- and sex-dependence of five major elements in the development of human scalp hair
Age- and sex-dependence of 5 major elements found in scalp hair (μg/g of hair). Data from male samples are represented by squares, and data from female samples are indicated by circles. The solid line is the least squares fitting result of age-dependence for female subjects (solid line) and for male subjects (broken line). Calcium and magnesium concentrations exhibit strong age- and gender-dependencies, but this dependence is weak for sulfur, zinc, and copper