The shampoo you choose can make a difference in the health and appearance of your hair. The pH balance of your hair and skin is about 5, or slightly acidic. Shampoos can be either acidic or alkaline; a shampoo that advertises itself as being “pH balanced” should be slightly acidic.

High-lift color -- color that involves the use of ultra-strength developers, bleach powder, or lift and tone colors -- causes the most damage to hair.

Synthetic hair fibers are fine threads manufactured to resemble human hair. Manufacturers may use single type, monofilament fibers, or a combination of two or three, polyfilament, fibers, Acrylic or polyester is used to make some fibers.

Dry curls leads to frizz and overall dullness. This hair type is more susceptible to dryness because curls prevent your scalp's sebum, or oil, from hydrating the entire length of your strands.

Beautiful healthy hair grows from a clean and healthy scalp. Each strand of healthy hair should have a shine or sheen that seems to come from within the hair shaft, with an intact cuticle. Healthy hair has few split or damaged ends.

A head of white hair is striking and elegant. Yellowed white hair, however, looks dull and dirty. White hair turns yellow due to a number of factors, some of which you can control -- such as smoking -- and others that you can't.

Over time, your hair follicles can become damaged due to age, over-styling, blow drying or environmental causes. This can lead to breakage, hair loss and an overall thinning of your hair. Follicles can also get clogged by oil and product buildup, which can harm them as well.

Fine and thin hair may be a bit more difficult to manage and style because it’s often limp and wispy. Oily hair can also be hard to manage, especially if the excess oil is due to overactive oil glands. The weight of the oil in your hair can weigh your hair down, making almost any hair style seem impossible.

Have you ever wondered what kind of damage would occur in your body if it made harmful or poisonous chemicals? Actually, our bodies produce harmful substances everyday. Catalase enzyme breaks down hydrogen peroxide, a toxic chemical, into hydrogen and peroxide.

Healthy Afro hair is beautiful. However, Afro hair tends to be fragile, porous, dry and prone to damage, partly because the coiled structure of African-American hair prevents oil from spreading evenly through the hair. The problems become more pronounced if the hair is heat-styled or overprocessed.

Weak hair is a common complaint among women. A woman's hair is often her crowning glory, so when it begins to break and thin it can be an embarrassing experience.

Everybody has nose hair. In fact, nose hair, or cilia, are part of an intricate defense system that provides protection to your lungs. In combination with mucus, cilia works to remove dirt and debris from your airways, preventing it from entering your respiratory system, according to Cedars-Sinai.