Minoxidil: How it works, side effects, and expectations explained
Many people consider Minoxidil a logical first step for thinning hair. The product is well-researched and can be effective, but it doesn't work equally well in every situation and can sometimes have side effects. In this blog, you'll learn how Minoxidil works, what happens during the shedding phase, what clinical results are known, and what factors determine if it might be useful for you. This neutral explanation will help you make an informed decision.
What Minoxidil does: a simple explanation
How Minoxidil works in the hair follicle
Minoxidil stimulates blood flow around the hair root and helps hairs move more quickly from the resting phase (telogen) to the growth phase (anagen). This can make hairs thicker, stronger, and more active. This effect is especially useful for early hereditary hair loss, when hairs are still present but slowly weakening.
The shedding phase explained
A well-known aspect of Minoxidil is the temporary shedding phase. As the growth cycle is reactivated, older hairs fall out more quickly. This can last for several weeks and is considered by researchers to be a normal part of the transition to a new growth period. Therefore, shedding does not mean that Minoxidil is not working; rather, it indicates that the cycle is shifting.
Potential side effects
Although Minoxidil is generally considered safe, the following reactions may occur:
mild to moderate irritation or itching
redness or flaking
temporary increase in hair loss (shedding)
unwanted hair growth where the product touches the skin
rare: palpitations or low blood pressure with incorrect use
The extent to which someone experiences these varies greatly.
What clinical studies show
Key findings from literature:
5% Minoxidil generally performs better than 2%, in both men and women.
Results are often visible after 8–12 weeks, with clearer improvements around 4–6 months.
The effect is not permanent; when you stop using it, the previous pattern of hair loss returns.
The product works particularly well for hair that is still present but thinning; completely lost follicles usually do not respond.
Sources: JAAD, Cochrane Reviews, International Journal of Dermatology.
Why this is relevant for people with hair loss
The importance of timing and consistency
Minoxidil works best for early or incipient hair loss. It also requires daily and long-term use. Many people stop too early due to the shedding phase or skin reactions, which prevents the full effect from becoming visible.
What you can realistically expect
The results of Minoxidil vary. Some people see a clear increase in density or fuller hair, while others primarily experience stabilization. Because it does not address an underlying cause but supports the growth cycle, consistency remains key.
In short
Minoxidil can be effective, especially in an early stage.
Shedding is part of the process and is temporary.
Side effects occur but are usually mild.
Long-term use is necessary to maintain results.
Hairborn® perspective
At Hairborn®, we believe it's important for people to have a clear, neutral, and realistic understanding of all available options. Minoxidil is valuable for many users, but it's not suitable for everyone — for example, due to scalp sensitivity, typical texture, or the commitment to daily use.
Our Hairborn® Growth Serum works with a combination of Hairborn Complex™, Baicapil™, Procapil™ and 7 other active ingredients. These ingredients are extensively studied in independent clinical and ex vivo research. Some results from the technical dossiers:
Hairborn Complex™ showed a +214% increase in hair growth in ex vivo research after 10 days, compared to +118% for Minoxidil 1%.
In a clinical study, users reported an average of +10,200 new hairs after 3 months, with 85% seeing improvement.
Baicapil™ shows up to −60% less hair loss in clinical measurements after 3 months.
Procapil™ significantly improves the anagen/telogen ratio and supports follicle strength.
These complexes target multiple growth pathways in the follicle and are usually well tolerated without the typical Minoxidil shedding.
We remain transparent: no single ingredient works for everyone, results vary per person, and consistent use remains essential. Our formula is developed in the Netherlands, produced in the EU, and based on scientifically proven active ingredients.
Start now
Do you want to support your hair growth with clinically researched, mildly formulated active ingredients? Discover the Hairborn® Growth Serum:
Want to know more?
Read more explanations in our knowledge base.
https://hairbornproducts.nl/blogs/kennisbank
Frequently asked questions
Is minoxidil available over the counter or do you need a prescription?
In the Netherlands, minoxidil up to 5% is available over the counter at drugstores or pharmacies, unlike finasteride, for which you do need a prescription. This makes it easily accessible, but a consultation with a doctor or dermatologist remains useful to determine if it is the right choice for your situation.
Can you use minoxidil foam and the liquid version interchangeably?
Yes, foam and liquid contain the same active ingredient and can, in principle, be used interchangeably, although many people find foam less greasy and it dries faster. Do not simply switch between concentrations in the middle of a period without consulting a professional, as the dosage per application may vary.
Does minoxidil also work for a beard or eyebrows?
Minoxidil is sometimes used off-label for beard growth or eyebrows, but it was originally developed and tested for the scalp. The reaction of facial hair to minoxidil is less well researched and may differ. If in doubt, consult a doctor before using it outside the scalp.
What happens if you stop using minoxidil?
If you stop using minoxidil, the underlying pattern of hair loss gradually returns, usually within a few months. This happens because minoxidil supports the growth cycle as long as you use it, but it does not remove the underlying genetic susceptibility. If you want to stop, do so gradually rather than abruptly for a less shocking transition.
Can you combine minoxidil with finasteride?
Yes, minoxidil and finasteride work through different mechanisms—minoxidil via vasodilation and finasteride via hormone regulation—and are often prescribed together in practice. The combination is regularly studied in literature and can yield stronger results for some people than either one alone.
Is there a difference between brand-name minoxidil and generic versions?
The active ingredient is identical, so generic versions with the same concentration work, in principle, just as well as brand-name products. Differences mainly lie in the surrounding formulation, such as the solvents, which can influence irritation. If you have doubts about quality, it is wise to choose a product from a reliable, recognized supplier.
Can you use minoxidil if you have a sensitive scalp?
Minoxidil can cause irritation, redness, or itching on a sensitive scalp, more often than on a less sensitive scalp. A lower concentration, such as 2% instead of 5%, sometimes causes less irritation with a slightly less strong effect. If you have a sensitive scalp, gradually build up use and stop if irritation persists.
Do you need to wash your hair before applying minoxidil?
It is not strictly necessary, but a clean scalp without excess sebum or styling products generally improves absorption. Most people apply minoxidil to dry hair, regardless of whether they have just washed it. However, make sure there are no other products on the application area that could hinder absorption.
Is minoxidil safe for women to use?
Yes, minoxidil in lower concentrations, usually 2%, has been specifically studied and approved for use by women with hair loss. Higher concentrations can more often cause unwanted facial hair growth in women, so a lower dosage is the common choice for most women. If in doubt, consult a doctor about the correct concentration.
Can you use minoxidil alongside a non-medicinal serum like Hairborn?
Yes, that is possible in principle, although it is wise to consider what you want to achieve with the combination. Minoxidil works through vasodilation, while a non-medicinal serum with ingredients like Redensyl or Procapil acts on the hair follicle through other pathways. Some people deliberately choose a non-medicinal approach first before switching to a medication with possible side effects.
