Scalp care: why treat the roots rather than the lengths

What you must remember

Visible hair is a keratinized structure: it protects itself, but it doesn't repair itself. Everything that determines its quality happens in the follicle, at the level of the scalp. This is the principle of scalp care—exfoliate the roots, wash at pH 5, and reserve rich treatments for the lengths.

  • Scalp care treats the scalp like skin, not like a support
  • Visible hair cannot be repaired: it protects itself
  • A congested scalp produces a finer hair fiber
  • Exfoliate, wash at pH 5, condition the lengths separately
"Scalp Care": Why treat the roots rather than the lengths - MakeMyMask

Are you applying mask after mask and oil to your hair without seeing any lasting change? That makes sense: the hair you're treating is a dead structure. Everything that determines its quality—its thickness, strength, and growth rate—is determined by the two millimeters of skin it emerges from. That's the principle of scalp care.

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What is scalp care?

Scalp care refers to the treatment of the scalp, which is considered as a skin in its own right, and not simply as a support. It is based on a simple physiological observation: the hair shaft is keratinized, therefore devoid of living cells, while the scalp is a living, vascularized, and innervated tissue.

  • Visible hair cannot be repaired: it protects itself
  • The scalp, however, is treated and rebalanced.
  • Every centimeter of future growth is produced in the follicle, not along the hair shaft.


Treating the lengths of your hair without caring for your scalp is like watering the leaves of a plant while ignoring the soil. Treatments for the lengths are useful; they protect and make detangling easier. But they have no effect on the hair that will grow out in three months: that's determined at the root, today.
Dr. Julie PernetDoctor of Pharmacy & Certified Trichologist

Why the scalp determines hair quality

The hair follicle is a veritable mini-factory: it draws from the microcirculation the amino acids and cofactors necessary for keratin synthesis. A scalp congested by excess sebum, inflamed, or weakened by harsh washing produces a thinner and less resistant hair fiber—even before it comes into contact with a straightener.

Signs of a scalp that needs scalp care

You may be affected if you observe several of these signs:

  • Roots that regain their oiliness in less than twenty-four hours
  • Itching, tightness or redness
  • A feeling of a heavy or congested scalp
  • The hair visibly thinner than two years ago
  • Recurring dandruff, whether dry or oily
  • An overall loss of density, without any clear depleted areas

Before
Before
After
After

Verified review

"My hair has regained its vitality, and I can now space out my shampoos to 4 days! Before, I had to wash it every 2 days because of itching related to excess sebum. My scalp is visibly healthier, and the results are conclusive."

Rachel D., a customer for 8 months

Discover the solution

The scalp care protocol to start from the root

A scalp care routine consists of three steps, in this order. Exfoliate your scalp once a week to remove thickened sebum and dead skin cells that clog the hair shaft. Wash with a pH 5 shampoo as often as needed, without fear of damaging the skin barrier. And reserve nourishing treatments for the lengths of your hair, never the roots, to avoid recreating the congestion you just cleared.

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To remember

  • Scalp care treats the scalp like skin, not like a support
  • Visible hair cannot be repaired: it protects itself
  • A congested scalp produces a finer hair fiber
  • Exfoliate, wash at pH 5, condition the lengths separately

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F.A.Q

What exactly is scalp care?
Scalp care involves treating the scalp as a separate skin unit rather than simply as a support. It is based on three steps: exfoliating the roots, washing with a pH 5 shampoo, and reserving nourishing treatments for the lengths of the hair.
Why is it necessary to treat the roots rather than the lengths?
Because the hair shaft is a keratinized structure without living cells, no treatment can regenerate it. The scalp, on the other hand, is living tissue. It's where every new centimeter of hair is grown, and therefore where an action has a lasting effect.
How often should I exfoliate my scalp as part of my scalp care routine?
Once a week is sufficient in most cases. On a very oily scalp, twice a week is possible; on a sensitive scalp or one experiencing an inflammatory flare-up, it is better to space it out to once every two weeks.
Does scalp care make hair grow faster?
It does not accelerate the growth rate, which is genetically determined. However, a clear and inflamed scalp provides the follicle with better conditions to produce a thicker and stronger hair fiber.
Should we abandon length treatments along with scalp care?
No, they retain all their usefulness: they coat the hair fiber, limit breakage, and make detangling easier. Scalp care doesn't replace them; it adds the missing layer—the one that acts on the hair's growth.

Written by

Dr. Julie Pernet

Doctor of Pharmacy & Certified Trichologist. Doctor of Pharmacy and Trichologist, founder of the DermoPilaire MakeMyMask Laboratory. She develops skincare protocols focused on scalp health, based on microbiome science and pH balance.

Dr. Julie Pernet