Effect of Oil Application, Age, Diet, and Pigmentation on the Tensile Strength and Breaking Point of Hair

The study investigated the tensile strength and elasticity of hair among 120 female volunteers divided into groups based on diet, oil application, age, and hair pigmentation. Results showed that children's hair had significantly higher elasticity compared to elderly hair (P = 0.05), but there was no significant difference in tensile strength. Nonvegetarians had higher tensile strength than vegetarians, but this was not statistically significant (P > 0.05). No significant differences were found in the other groups. The study concluded that while children's hair is more elastic, tensile strength does not significantly vary with age, diet, oil application, or pigmentation.