Hair growth serum: how to choose one and what to expect from it

19/10/2026

A hair growth serum is a cosmetic product for the scalp that stays in place once applied, so unlike a shampoo it has time to act. It is a cosmetic, not a medicine, so it does not control hair growth itself, but it can be part of a calm care routine for the roots. Take a look at our hair serums, the Vlasorost tonic or the Stimulating serum with caffeine and ginger, or let our Advisor guide you.

A woman in a bathroom gently applying serum to her scalp and massaging it with her fingertips

What a hair growth serum can and cannot do

A hair grows from the hair follicle, a tiny sac deep in the skin, and its growth runs in cycles that alternate phases of growth, rest and shedding. This alternation is natural, so losing a few hairs a day is no reason for concern. A serum is applied from the outside, to the surface of the scalp, so it cannot change the internal processes that govern growth, such as hormones or a hereditary predisposition. What it can do is look after the environment in which hair grows: care for the scalp, refresh it, make massage more pleasant and let the hair look neater at the root. If you expect a miracle in a week, you will be disappointed. If you are looking for a calm evening ritual for your scalp, a serum is a good helper for such a moment. When choosing, it is therefore worth reading the composition on the label, not just the words on the packaging.

Water-based tonic or oil serum: the difference is in the composition

Two different types of product hide under the name hair growth serum, and the name tells you nothing about which is which. In Panakeia's range you can see this clearly in two products of our own production. Vlasorost is called a tonic, it has a water base of rosemary and green tea water, and in the composition you will find caffeine, niacinamide, panthenol and extracts of nettle and burdock. It also contains alcohol, listed third in the ingredients, so do not use it on irritated skin, as the label warns. The Stimulating serum, on the other hand, is oil-based, with no water in the composition. Its base consists of olive and argan oil, black seed oil, walnut leaf extract, Arabica coffee seed extract and ginger oil. The difference between them is therefore mainly in texture and in what the scalp likes.

Feature	Vlasorost tonic	Stimulating serum
Base	water-based, rosemary and green tea water	oil-based, no water in the composition
Ingredients from the label	caffeine, niacinamide, panthenol, nettle, burdock	olive and argan oil, black seed, coffee, ginger
Alcohol in the composition	yes	not listed
Fragrance allergens	linalool, geraniol, citral, limonene, eugenol	citral, limonene, geraniol, linalool, citronellol
Pack size	50 ml	50 ml

What to look for in the composition of a hair serum

In hair serums and tonics you will most often meet rosemary, nettle, burdock, caffeine, niacinamide and panthenol. Rosemary, Rosmarinus officinalis, and greater burdock, Arctium lappa, are among the herbs traditionally used in hair care. Panthenol is used in cosmetics as a conditioning ingredient that helps retain moisture. There are also studies on caffeine and hair growth (source: the PubMed database), but the results should be read with reserve, and no ingredient is a guarantee of a visible change. Look at the order of ingredients too: the higher an ingredient is in the list, the larger its share. If the active ingredient comes only at the end, there is little of it in the product. And remember that a product name is no substitute for the composition: what counts is what is written on the label.

Bottles of hair tonic and oil serum next to a sprig of rosemary and ginger on a wooden shelf

How to use a scalp serum in a calm routine

The most important thing is to follow the instructions on the label of the particular product, because a tonic and an oil serum are applied and left on differently. A common procedure can look like this:

Before first use, test the product on a small patch of skin, for example on the forearm, and read the warnings on the label.
Divide your hair into sections so that you reach the scalp, not just the lengths.
Apply the serum to the scalp in thin lines, not to the ends.
Massage it in gently with the pads of your fingers, not your nails, in circular movements.
Follow the contact time and method of use from the label, then wash your hands.

Regularity matters more than quantity. It will serve you best in the evening, when you have a moment of time and are in no hurry, because both the scalp and the mind settle better in calm than in the rush before leaving the house. A scalp massage is above all a slowing down: it relaxes the shoulders, softens the day, and the scent of rosemary or ginger gives you the feeling of a small ritual just for you. Judge any change in your hair after a longer time and rather by photographs than by the impression of one morning; hair grows slowly and each of us has it a little different. Do not worry if on some evening the routine does not work out, you can calmly pick it up again tomorrow.

Serum, shampoo and rosemary water: how they complement each other

A serum is only one part of care. A shampoo is in contact with the scalp briefly, but it cleans it of sebum and styling residues, and we write about its possibilities in the article on shampoo for hair growth. Rosemary water is a light spray that is appreciated especially by a scalp that tends to get greasy, and you will find a guide in the text on rosemary water for hair. You do not have to include all three steps at once. Start with one and add another only once you are used to it, so that you know what suits you and what irritates the scalp. Simpler routines are kept up for longer, and it is long-term regularity that makes the biggest difference in hair care.

When is it better to talk to a doctor?

A serum is a cosmetic and does not find out why hair is falling out. Book an appointment with a dermatologist or doctor if you notice any of the following:

sudden and patchy thinning of the hair
visible bald spots or bare areas
itching, redness or tenderness of the scalp
hair loss that came together with another change in your health

There are several causes and only a specialist can tell them apart. A cosmetic product will not solve them and is not meant to replace an examination.

Did you know…

Did you know that every hair grows in its own cycle, in which phases of growth, rest and shedding alternate?

Frequently asked questions

Does a hair growth serum help?

A serum is a cosmetic that looks after the scalp and the look of the hair, not a medicine, and hair growth is governed by processes in the follicle that it cannot change from the outside. It can, however, be a pleasant part of regular care that gives the scalp attention and time, which it often lacks in the rush of everyday days. If hair loss bothers you, book an appointment with a doctor, because only a doctor can determine the cause and a cosmetic product will not replace one.

What is the difference between a hair tonic and a serum?

The answer is in the composition, not in the name. A tonic usually has a water base and a lighter texture, while a serum can be water-based or oil-based. So look at the first ingredients on the label: if water is at the start, it is a light water-based product, and if oil, it is an oil serum. Both forms are applied to the scalp and each has its own instructions for use, which you should read carefully before first use. You can also decide by which texture feels more pleasant to you.

Is a serum better, or vitamins for hair?

These are two different routes. A serum is applied from the outside and is a cosmetic, while vitamins are taken by mouth and are food supplements, which are assessed differently. Which route to choose, and whether you need it at all, a doctor or pharmacist can tell you. The two can be combined in hair care, but with vitamins follow the label and the advice of a professional, not a promise in an advert.

When will I notice a change in my hair?

Hair grows slowly and each of us has her own rhythm, so a change is judged after a longer time, not after a few days. It helps if you take a photograph of your scalp and hair at the start in the same light and compare it later. The impression from one morning can be misleading, while photographs are more reliable. While you wait for a result, enjoy the ritual itself: the scent, the touch and the moment of slowness that you give yourself.

Can I use a serum if I have a sensitive scalp?

The labels of both products mentioned warn that they should not be used on irritated or sensitive skin. Before first use, try a small amount on a small patch of skin and look at the composition, especially the alcohol and fragrance allergens. If redness or itching appears, stop using the product and consult a doctor. A scalp can be sensitive for various reasons, so there is no reason to irritate it further.

Author: Erika Bundalová, head of production and development at Panakeia SK. She prepared the text based on the actual composition of the products and current cosmetics legislation.