For something that is dead, hair can still be problematic. As strands of hair grow, the outermost layer of the cuticle damages over time. This can leave hair looking dry and brittle, while breaking easily and frizzing readily. Once hair is damaged, the best recourse is to have patience and let it grow back. But in the meantime, you can understand what causes brittle hair in the first place.
Heredity
Some people are more prone to brittle hair because of their genetic makeup. While lifestyle choices and care can influence the luster and healthiness of hair, they will always have more delicate, dry hair.
Hair Care
Extra moisture for drier hair may be necessary, but some people don't invest in hydrating products. Conditioner, for instance, could leave hair smoother and shinier. Hair may be less soft and more prone to knots and breakage as a result.
Styling Products
Fine, fragile hair is especially vulnerable to styling tools. Curling irons, straightening irons, and even blow dryers can damage the hair by depleting its moisture if used too often. This may also apply when hair is straightened, permed or bleached, particularly at the ends of hair which are the most overprocessed sections.
Sun Exposure
The UV rays of the sun can damage the outer layer of the hair's cuticles just as a blow dryer would. This can impair or destroy the molecular bonds that create elasticity in healthy hair.
Hormonal Imbalance
Hormonal changes, like pregnancy, can make hair appear thicker and more lustrous. Others will do the opposite. Thyroid disorders, such a hypothyroidism, a condition in which the thyroid gland produces little or no thyroid hormone, can cause hair to look very brittle.
Poor Diet
Bad eating habits not only influence skin quality, but hair consistency too. A diet lacking proteins, fats and carbohydrates can be reflected in dull, dehydrated looking hair. It is also important to have calcium, Vitamins A, C and E, and drink plenty of water.
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