Thyroid disease can manifest itself in dry, brittle hair, brittle nails, and weight gain or loss.
Extended use of these products can lead to split ends and brittle hair.
A good source of biotin, avocados help to prevent dry skin and brittle hair and nails.
Contact with strong oxidizing acids such as nitric acid, chromic acid and so on, due to strong oxidation products will cause brittle hair, discoloration, early damage.
