Hair that gets greasy quickly is a common problem, often a source of aesthetic discomfort… but also of worry. One question comes up regularly: can oily hair contribute to hair loss? To answer this, it is essential to understand the role of sebum, the mechanisms of its imbalance, and its consequences on scalp health.
How does hair become oily?
Sebum is a lipid substance naturally produced by the sebaceous glands , located at the base of the hair follicle. Its role is fundamental: along with sweat, it forms the hydrolipidic film that protects the scalp and hair from dehydration, external aggressors, and breakage. In normal quantities, sebum contributes to shiny, healthy hair.
However, in some people, the sebaceous glands produce excess sebum: this is called seborrhea. This overproduction exceeds the physiological needs of the scalp and leads to a rapid oily appearance, sometimes as early as a few hours after washing.
The main causes of seborrhea
Several factors can explain this disruption:
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Hormonal imbalances, particularly an excess of androgen hormones
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Increased activity of the 5-alpha-reductase enzyme, which converts testosterone into DHT (dihydrotestosterone), a hormone directly involved in the stimulation of sebaceous glands
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Pollution and UV rays damage the scalp.
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Unsuitable or overly aggressive hair products
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Chronic stress
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A diet with a high glycemic index indirectly promotes the production of androgens.
Oily hair and hair loss: is there a link?
The hydrolipidic film is essential for a balanced scalp. But when it is disrupted by an overproduction of sebum, it can become problematic.
Excessive sebum and follicle asphyxiation
In cases of seborrhea, sebum accumulates in the hair follicles . This accumulation can:
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Block hair follicles
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Hinder proper oxygenation of the hair bulb
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Disrupting local blood circulation
The result: the root is gradually suffocated. The hair produced then becomes thinner, shorter, duller and more fragile.
Impact on the hair growth cycle
In the long term, excess sebum can disrupt the hair cycle, particularly the growth phase (anagen phase). This phase tends to shorten progressively, preventing the hair from reaching normal length and thickness. In some cases, the follicles eventually weaken permanently, leading to more pronounced hair loss.
Other associated signs
An overly oily scalp can also cause:
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Itching
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Dandruff (greasy flakes)
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A feeling of discomfort or irritation
These signs indicate an unbalanced scalp, which requires appropriate care.
How to regulate excess sebum and protect your hair?
The good news is that it is possible to effectively treat seborrhea through simple actions and a suitable hair care routine.
Adopt a gentle and regular hair care routine
Opt for gentle, scalp-friendly products that cleanse without stripping or damaging, such as our Thickening Shampoo No.1. An irritated scalp tends to produce even more sebum in reaction.
Wash your hair as soon as it gets greasy
Contrary to popular belief, intentionally leaving your hair greasy doesn't improve the situation. If your scalp gets oily quickly, it's best to wash your hair as needed: every day for some people, but not for everyone.
The ideal frequency depends on your scalp, hair type, and hair length.
Pay attention to the water temperature
Avoid water that is too hot, as it stimulates the sebaceous glands. Lukewarm water, or even slightly cool water at the end of washing, is more suitable.
Addressing the root cause: hormonal regulation
In some cases, the use of DHT blockers can help treat hyperseborrhea at the source, by limiting the impact of androgens on the sebaceous glands.
A healthy scalp is the foundation of strong, thick, and healthy hair. When it is unbalanced by an overproduction of sebum, hair growth can be stunted and hair loss exacerbated.
It all starts at the root: by taking care of your scalp, you give your hair the best conditions for healthy, long-term growth. Take care of it, and it will take care of you.