How to avoid oily hair

What are the causes of oily hair?

What we term ‘oily hair’ is actually a scalp problem. Each follicle on the scalp has a sebaceous gland which continually produces a complex mixture of natural lipids called sebum.¹ These lipids are secreted onto the hair as it grows at around 0.35mm per day.²

At low levels, sebum lubricates the hair, reducing mechanical damage and providing moisturisation that helps keep hair shiny and healthy.^1,4 It also helps with balancing your scap microbiome and maintaining its protective barrier.⁴ In younger adults, around 0.05mg/cm3/hr is produced on the scalp,³ which doesn’t sound like much, but it soon adds up to over a gram every day.⁵

Unfortunately, when too much sebum builds up on your hair, the hair starts to look and feel worse. It loses its shine and becomes greasy and heavy, resulting in clumpy, flat hair styles.⁴ Excessive sebum also acts as a glue for particulates such as dust, dirt and pollution.¹ Too much sebum can have adverse effects on the health of your scalp, including a higher chance of dandruff and a sensitive scalp.⁵

What causes overproduction of sebum?

Sebum production is primarily regulated by hormones, however there is often a seasonal change⁶ to production rate and some lifestyle factors such as diet can affect overproduction too. An increase in dietary fats and carbohydrates, for example, can cause increased sebum production. And a significant drop in calorific intake can cause a reduction.⁷

What are the symptoms of oily hair?

Hair can get greasy as the sebum is spread along the hair,¹ leaving hair looking and feeling slick and heavy.

Excessive sebum is also linked to dandruff and itching on the scalp.⁵ This is more noticeable as your hair and scalp becomes more coated in sebum. The bacteria on your scalp converts parts of your sebum into free fatty acids which can be irritating.^8,9

How to prevent oily hair

Luckily, when it comes to hair care cosmetics, the industry has experienced revolutionary change over the past three decades. The focus has shifted from just cleaning to repairing, conditioning, and stimulating growth.

The surfactants used in shampoos have become milder and less irritating, making it easier to look after your scalp and hair without causing significant damage.¹⁰ One of the main functions of shampoo is to remove surface debris and oil from the hair and scalp – helping refresh your hair and reduce the greasy appearance caused by excessive sebum.

Keeping on top of oily hair, and having a balanced hair care routine, can be difficult to achieve. For some, a regular hair wash is once a week, while for others it can be once a day. Recent studies¹¹ have shown that frequent washing can be beneficial, giving improved odour control and reduced scalp flaking. But this needs to be balanced against the time taken to wash and dry hair, which can be significant.

Cleanse the scalp

Shampoo removes sebum, debris and pollution from the hair and scalp. Shampoo products often contain conditioning actives that help with hair manageability, and fragrance to leave a pleasant odour.¹

Regular use of shampoo can help maintain scalp health, and certain shampoos are specially formulated to reduce dandruff or even hair loss.¹²

Depending on your washing frequency and sebum production rate, you may need to select a more appropriate shampoo. Clarifying shampoos contain higher levels of surfactants to enable a more complete clean. If you suffer from oily hair, using a clarifying shampoo once a week for a deep cleanse can be beneficial. And if you have specific scalp conditions then it can be a good idea to choose a product that’s specifically designed to treat this. It’s important to give the active ingredients within the shampoo enough time to get to work before rinsing.¹³

There are even some products that claim to help reduce sebum production and these may provide a benefit for some people.

Condition hair

Including conditioner in your hair washing routine can help to keep hair soft, smooth and shiny, along with controlling fly-away hairs.¹⁰

However, if your hair is prone to looking oily, only apply conditioner to the ends and avoid intensive conditioners such as those labelled with the words like 'dry', 'damaged', 'smoothing' or 'glossy'. These products contain higher levels of conditioning agents, and depending on your hair type and condition, can both weigh down your hair and leave it looking and feeling greasy.¹⁰

Keep hair off your face

To prevent oily hair becoming more problematic as the day progresses, it’s recommended to avoid contact with your face. Refrain from over brushing or playing with your hair, as this will only distribute the sebum down the length of the hair. Try using a wide-tooth comb to remove knots, steer clear of sticky or oily styling products, and wear your hair in an updo if you tend to play with it.

Everyone produces hair oil (it’s natural), but if your hair gets oily very quickly, think about changing your routine to control the problem on a day-to-day basis. The goal is hair that looks shiny and voluminous instead of greasy and weighed down. This guide, with its tips and recommendations, should assist in helping to remedy the problem and ensure oily hair doesn’t get in the way of you looking and feeling great.

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