Yes if you are not eating a balanced diet then it can lead to chronic hair loss. Even a slight change in the food ingredients might cause change in hair health. The rule of thumb it to avoided allergens, alkaline food and acidic meals. You should also try to avoid carbonated drinks, sugary and greasy food as they can cause a build-up of plaque on the scalp leading to the shrinkage of the follicles. Take a closer look at what you are eating before you rush to a dermatologist worried about your hair health.
Low calorie diet, iron deficiency and low proteins and Vitamin B in the diet can cause a decrease in keratin levels, which can weaken the hair and cause hair loss. Excess intake of Vitamin A can also cause hair loss.