Unless you've been rolling around in mud, you probably don't have hair that is truly dirty. However, it may feel greasy and look dull. Your skin produces sebum, a greasy substance, to coat and protect hair and the hair follicle. Sebum coats the cuticle or outer keratin coat of each hair strand, giving it a healthy shine. However, over time, sebum also makes your hair look dirty.
An accumulation of it causes hair strands to stick together, making your locks look dull and greasy. Dust, pollen, and other particles are attracted to the sebum and stick to it. Sebum is hydrophobic. It waterproofs your skin and hair. You can rinse away salt and skin flakes, but oils and sebum are untouched by water, no matter how much you use. Shampoo contains detergent , much like you would find in dishwashing or laundry detergent or bath gel.
Detergents work as surfactants. They lower the surface tension of water, making it less likely to stick to itself and more able to bind with oils and soiling particles. Learn all the ways you can get a healthy scalp, from what hair products to use to what to eat.
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Some say henna can leave your locks fried. Love dry shampoo but dislike the ingredients? These 12 picks offer safer, organic formulas that still soak up excess oil. Learn more about how hyaluronic acid can benefit hair health, plus tips on how to use it. Health Conditions Discover Plan Connect. How to Get Rid of Greasy Hair. Written by Rena Goldman — Updated on July 3, Get grease-free hair Causes Next steps We include products we think are useful for our readers.
Read on to learn more about what causes greasy hair and what you can do to tame oily tresses. Greasy hair causes. Next steps. Your skin produces the natural oil, sebum, which protects your hair and hair follicles.
The upgrade takes its inspiration from leading skin care products and cares for your scalp in 3 steps:. Shampoo contains molecules called surfactants. These emulsify the sebum, allowing it to mix with water. This may make it still appear greasy after washing.
These items can pick up sebum from the scalp when used regularly. Using them without washing them between hair washes may result in the hair become greasy faster. Some evidence suggests that environmental factors may affect hair and scalp health. A study found that air pollution was causing an oily scalp in people living in cities, along with other scalp issues such as itching and dandruff.
Diet may also play a part in excess sebum production. According to a article , dairy and a high-glycemic diet may affect androgen hormones that influence how much sebum the skin produces. If scaly patches are also present, a person may have seborrheic dermatitis.
Seborrheic dermatitis is a common skin condition and can cause scaly, greasy patches on the scalp and skin. Scaly patches may itch or burn and may flake off. Treatment for greasy hair can depend on the underlying cause. Managing excessive oil or changing hair care habits may help.
People with straight or fine hair that gets greasy quickly may need to wash their hair daily to remove excess oil. Using a clarifying shampoo occasionally may also help to remove excess residue and build up. Using products containing green tea may help to control greasy hair. A study looked at the effects of a green tea hair tonic on oily hair in 20 healthy participants.
After 28 days of use, the green tea hair tonic significantly reduced oil on the scalp compared to the placebo and tonic base.
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