Hair follicles are the sacs in the skin from which hair grows. Cells group together in the pore, they attach to a sebaceous gland (a gland that produces oils to lubricate the hair shaft), and muscle fibers, which help the hair grow away from the skin.

Minerals are an essential dietary component; without them, you may experience hair and nail problems. Deficiencies in certain minerals can lead to thinning strands and weak, brittle or spotted nails.

Facial hair is a natural occurrence, but for some people, especially women, it can become excessive and bothersome. Hirsutism is a condition in which women experience male facial hair growth, which may result from a hormonal imbalance.

Oils are unrivaled when it comes to treating dried-out tresses. Natural oils nourish hair deeply for the kind of lasting results that knock the temporary effects of creams and lotions out of the park. When choosing an oil to use as a hair treatment, take your hair type into account.

A hair is either pigmented or it's white. In fact, a person who's afraid of "going gray" as he ages might be comforted to know that gray hairs don't actually exist. Gray hair is an optical illusion -- the product of colored hairs mixed in with white hairs.

It's important to stay aware of your overall hair health. Before you consider new treatments, dyes or an all-together new 'do, take stock of your hair's current state and evaluate how your hair-care routine is affecting it.

African-American hair grows best when cared for with natural products that do not contain drying or pore-clogging ingredients. The basic tenets of African-American hair growth include regular shampooing, deep conditioning and applying natural moisturizer that is free of petroleum, wax and mineral oil.

Avocados are a fruit whose many health benefits are becoming more widely known. One benefit avocados offer is preventing hair loss and promoting hair growth. They can also be used to improve the condition of your hair by acting as a moisturizer for dry or damaged hair.

While you may or may not use it in the kitchen, grape seed oil actually has plenty of uses as a treatment for your hair. Like olive oil and coconut oil, grape seed oil is an effective natural hair moisturizer and conditioner.

In short, yes, you can use vegetable oil as a home remedy for dry hair. However, the oil must be carrier oil -- the kind derived from the fatty portion of the plant and often used to dilute essential oils -- rather than off-the-shelf cooking oil.

Head & Shoulders shampoo is widely recognized as an effective anti-dandruff shampoo. The active ingredient in the basic formula is zinc pyrithione. This substance helps reduce dandruff thanks to its antifungal and antibacterial properties.

Methylsulfonylmethane, or MSM, is a sulfur-based compound that is found in various foods. It also occurs naturally in the body and is available as a supplement.