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The Best Serums for Hair Growth

hair loss
hair loss
hair care

Last updated: 5/21/2026

/ Published: 5/21/2026

The best serums for hair growth and how they help strengthen it from the root

Does your hair look finer and weaker? Are you shedding more than usual? Do you feel it has lost strength and volume? During the spring and summer months, factors such as the sun, heat and exposure to chlorine or salt water can weaken the hair follicle, causing seasonal hair loss, known as “seasonal telogen effluvium”. The good news is that we can reduce and prevent hair loss and also stimulate growth, helping both to prevent and tackle the problem. How is that possible? With hair growth serums, which help give weak, fine hair strength, volume and vitality. In this post, we explain which are the best serums for hair growth. Keep reading!

Hair habits and care to help activate growth

Besides using this kind of growth booster, it is essential to maintain good haircare habits and use the right cleansing and protective products, as creating a healthy scalp environment is key to hair growth. These habits can help stimulate the hair growth phase:

  1. Massage the scalp daily: to improve follicle microcirculation and encourage thicker hair.
  2. Reduce stress: it releases cortisol, and high cortisol levels accelerate entry into the telogen or shedding phase and slow growth. Reducing stress therefore helps stabilise the hair cycle.
  3. Protect the fibre from heat and mechanical damage: try to reduce the use of straighteners and hairdryers, and always use heat protection, as well as protection when exposed to the sun.
  4. Maintain proper scalp hygiene: wash it according to its needs with the right products, avoiding the build-up of oil and residue that can inflame the follicle.
  5. Follow a balanced diet rich in iron, zinc and biotin.

Hair growth serum: how does it work?

A hair growth serum is a lightweight but highly concentrated formula with key active ingredients, designed to act directly on the scalp and hair follicles. Thanks to its fluid texture, it penetrates quickly without weighing the hair down or making it greasy. It helps improve blood circulation in the area, which is why it is designed to stimulate hair growth from the root while also reducing hair loss.

The benefits of a hair growth serum therefore include:

  • Providing nutrients and oxygen to the follicles thanks to improved microcirculation.
  • Strengthening the hair fibre, reducing breakage and therefore helping maintain density.
  • Faster, more regular growth thanks to stimulation of the bulb to prolong the active growth phase.

It is also important to know how the serum should be applied. It should be applied directly to the scalp, using a gentle massage with circular movements of the fingertips in order to stimulate microcirculation and help the active ingredients absorb.

The effects of a hair growth serum are not immediate, so patience and consistency are needed. It is usually recommended to wait around three months, with daily use, before beginning to notice results.

Which is the best serum for hair growth?

Now that you know all its benefits, here are the 4 best serums for hair growth available at FarmaciasDirect:

  • Vichy Dercos Aminexil Clinical R.E.G.E.N Booster

Vichy Dercos Aminexil Serum reduces hair loss and stimulates hair growth thanks to its content of Aminexil, ginger and niacinamide, while also strengthening the hair. It also has a lightweight, fast-absorbing texture that leaves a non-greasy finish.

To apply it, divide the hair into 4 sections and apply 1 dose to each one, equivalent to one pipette filled to the mark. The application should be repeated 5 to 7 times per week for 12 weeks on either a damp or dry scalp.

  • Klorane Intensive Growth Accelerator Serum

Its highly concentrated formula combines medicinal quinine with adenosine to activate and accelerate hair growth and is also enriched with keratin-like, another naturally derived active ingredient that deeply repairs the hair fibre to strengthen and redensify the hair, resulting in hair that grows faster and stronger. It has a lightweight texture that absorbs quickly with a non-greasy finish and does not weigh the hair down.

To apply Klorane Growth Accelerator Serum, divide the hair into 5 to 7 sections and apply it to the scalp, either dry or damp. Then massage vigorously for 30 seconds to stimulate skin microcirculation, and dry or style as usual without rinsing.

  • Triphasic Active Grow Serum by René Furterer

Rene Furterer Triphasic Serum contains a powerful complex of active ingredients with a technology that activates keratin production from the root, combined with caffeine to stimulate microcirculation and reactivate hair growth with visible results from the first month. Its texture leaves an invisible, non-greasy finish, ideal for daily use.

It is applied once a day to either a dry or damp scalp with a gentle massage, without rinsing.

  • Iraltone lotion

Iraltone Anti-Hair Loss Lotion is an ultra-light lotion with ingredients such as Serenoa repens and growth-factor-analogue peptides (IGF-1)... that act on the mechanisms involved in hair loss, making it a comprehensive solution that offers triple action: strengthening the hair, improving density and vitality, and controlling excessive hair loss caused by hormonal factors, seasonal changes, stress, an unbalanced diet or other reasons.

It is applied once a day, preferably at night, to the affected areas of the scalp, massaging gently to aid absorption and leaving it to act overnight, with no need to rinse.

So, if we want to stimulate hair growth, adding a hair serum to our haircare routine is highly effective, as it stimulates growth, strengthens the fibre, repairs weakened areas, nourishes and strengthens the root, and adds strength and shine to the hair, while reducing hair loss and improving density.

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Nutrition and Dietetics
License Number: 7700
Julia Mendoza Murillo