ARTICLES / MEN

How can you grow a thicker beard? Minoxidil, serums?

By Yoram Harth, MD | Sep 30, 2026

Medically reviewed by Dr. Yoram Harth, Board-Certified Dermatologist | Sep 30, 2026

Illustration of beard growth treatments including Minoxidil, natural serums, and vitamins used to promote thicker facial hair.

Quick Answer: What really helps grow a thicker beard?

Genetics is the main factor that decides how thick your beard grows. It controls how strongly your beard follicles respond to testosterone and dihydrotestosterone (DHT).
Topical minoxidil is the best-studied treatment for a sparse beard. In a randomized, placebo-controlled trial, minoxidil 3% increased beard hair count after 16 weeks [1]. Using minoxidil on the beard is off-label, since it is FDA-approved only for the scalp.
Hair growth serums such as the MDhair Regrowth Serum and Restore Serum are made for the scalp and are not specifically indicated for beard hair regrowth. Their ingredients, including caffeine, rosemary, copper tripeptide-1, and panthenol, can still support fuller, healthier-looking facial hair.
DHT blockers don't help beard growth. DHT causes hair loss on the scalp, but it is the hormone that drives beard growth, so blocking it works against you.
Most men need 3–4 months of daily use before they see a difference. Results last only as long as you keep up the treatment.

What decides how thick your beard grows?

This section explains the biology behind beard growth, so you can understand why some treatments work and others don't.

Your genes are the biggest factor in how thick your beard grows. If the men in your family have had a hard time growing full facial hair, there's a good chance you will too. Ethnicity also plays a role, and some groups tend to grow denser beards than others. None of this is something you did wrong. It comes down to how your hair follicles are programmed.

Beard growth is driven by androgens, the male hormones testosterone and its more potent form, DHT [2]. In puberty, rising androgen levels turn the fine, light "vellus" hairs on the face into thick, dark "terminal" beard hairs. How strongly each follicle responds depends on its sensitivity to androgens, and that sensitivity is inherited. That's why two men with the same testosterone levels can grow very different beards.

Why does DHT grow beards but shrink scalp hair?

This is known as the androgen paradox. The same hormone has opposite effects on different follicles [2]. On the scalp of men who are genetically prone to it, DHT gradually shrinks follicles and causes male pattern hair loss (androgenetic alopecia). On the face, chest, and body, DHT stimulates follicles to grow larger, thicker hairs.

This matters when you choose a treatment. Ingredients that block DHT, such as saw palmetto, pygeum, or the medication finasteride, are useful for scalp hair loss. They don't boost beard growth, and in theory they could work against it. Men who make very little DHT because of a rare genetic enzyme deficiency grow only sparse beards, which shows how much the beard depends on this hormone [2].

What medical conditions can cause a thin or patchy beard?

Most sparse beards are genetic, but some have a medical cause worth checking with a doctor.

Lifestyle factors, including chronic stress, poor sleep, and a low-quality diet, can slow hair growth everywhere, including the beard. Some less common medical causes are:

Low testosterone (hypogonadism): Can lead to reduced beard growth, along with other symptoms.
Alopecia areata of the beard (alopecia barbae): An autoimmune condition that causes round, smooth bald patches in the beard [3].
Underactive thyroid (hypothyroidism): Can slow hair growth and make hair thinner.
Iron deficiency (anemia): A common, treatable cause of reduced hair growth [4].
Infections and inflammation: Fungal infection (tinea barbae) and ingrown-hair bumps (pseudofolliculitis barbae) can also cause beard hair loss [3].

What are the signs of low testosterone in men?

Low testosterone can cause erectile dysfunction, infertility, reduced muscle mass, low energy, and gynecomastia (development of breast tissue). If you have one or more of these symptoms, please see your doctor for a blood test. Taking testosterone supplements when your levels are normal will not improve your beard, and it can cause side effects.

If your beard has sudden round bald spots, is itchy or inflamed, or is falling out after growing normally, see a dermatologist before starting any beard growth product.

Does minoxidil work for beard growth?

Minoxidil is the most studied treatment for a genetically sparse beard, but it's important to know it is used off-label.

Yes. Minoxidil can help grow a thicker beard, but using it on the face is off-label. Minoxidil is the only topical medication FDA-approved for hair regrowth, and that approval covers the scalp only. Dermatologists do use it for the beard, based on clinical evidence and experience.

Minoxidil works by widening blood vessels around the follicle, lengthening the active growth phase (anagen), and enlarging follicles that have shrunk [5]. These effects don't depend on DHT, which is why minoxidil can help the beard even though it was developed for scalp hair loss.

What does the research show?

The best evidence comes from a 16-week randomized, double-masked, placebo-controlled trial of 48 men aged 20–60, published in the Journal of Dermatology [1]. The men applied minoxidil 3% lotion or a placebo to their beard area twice a day.

Photographic score: The minoxidil group's beard growth was rated significantly higher than the placebo group's.
Hair count: Beard hair count rose by an average of 5.0 hairs in the treated area with minoxidil, compared with 0.35 with placebo.
Self-assessment: The men using minoxidil rated their own improvement significantly higher.
Safety: Side effects were mild.

The study was small and short, and it did not show that the individual hairs got thicker. Still, it supports what dermatologists see in practice: minoxidil can fill in patchy areas and increase beard density.

How do you use minoxidil on your beard?

Using minoxidil correctly gives you the best results with the fewest side effects.

Because beard use is off-label, it's a good idea to talk to your doctor before you start. Here is how to use it:

Start once a day. Apply minoxidil to the beard area in the morning or before bed for the first two weeks.
Increase to twice a day after two weeks if your skin tolerates it. This matches the clinical study [1].
Use a full dropper (about 1 ml) on the sparse areas and gently massage it in with your fingertips.
Leave it on for at least 4 hours before you wash your face.
Wash your hands right after applying, so you don't grow hair where you don't want it.
Keep it away from pets. Minoxidil is toxic to cats even in small amounts. Don't let pets lick your face or hands after you apply it.

Shaving doesn't make your beard grow thicker, and it doesn't change how minoxidil works. A shorter beard does make it easier to get minoxidil or a serum directly onto the skin.

How long does minoxidil take to work on a beard?

Many men notice some shedding in the first few weeks. This happens as new, stronger hairs push out the older, thinner ones, and it usually means the treatment is starting to work. Keep going. With daily use, most men see a thicker beard in 3–4 months. You need to keep using minoxidil to maintain the results, and we recommend continuing for at least 12 months.

What are the side effects of minoxidil on the face?

Minoxidil is generally a very safe topical medication. The most common side effects on the face are dryness, redness, flaking, and itching, which a gentle moisturizer usually helps. Less often, it can cause an allergic reaction or acne in the treated area. If you have high blood pressure, a heart condition, or take blood pressure medication, check with your doctor before using minoxidil.

Can hair growth serums help grow a thicker beard?

Non-medicated serums are an option for men who want gentler support, or who want to combine them with minoxidil.

Most hair growth serums, including the MDhair Regrowth Serum and Restore Serum, are formulated for the scalp and are not specifically indicated for beard hair regrowth. They have not been tested in beard studies. Many of their ingredients do nourish hair follicles and condition the hair and skin, so they can be used on the beard to support fuller, healthier-looking facial hair.

Which ingredients should you look for in a beard serum?

Caffeine: Stimulates hair follicle growth in lab studies and supports the active growth phase [6].
Rosemary leaf extract: In a randomized trial on scalp hair loss, rosemary oil gave results similar to minoxidil 2% after 6 months [7].
Copper tripeptide-1 (GHK-Cu): A copper peptide that supports follicle health, collagen production, and tissue repair [8].
Biotinoyl tripeptide-1: A biotin-peptide complex that helps strengthen and anchor hair.
Panax ginseng root: Helps support stronger, denser hair growth.
Panthenol (vitamin B5): Conditions the hair and soothes the skin underneath.
Niacinamide: Supports a healthy skin barrier under the beard.

A good beard serum also includes ingredients that condition and moisturize, such as vitamin E, hydrolyzed proteins (wheat, silk, rice, or oat), castor oil, argan oil, avocado oil, and aloe vera. These help strengthen beard hairs, reduce breakage, and ease the itch and flaking that often come with growing a beard.

How can MDhair products support beard growth?

This section connects the science above to specific MDhair products and explains how to combine them.

MDhair products are designed for the scalp, but their ingredients work on the same biology as beard follicles. Here's how each one fits in:

MDhair Regrowth Serum

The Regrowth Serum contains caffeine, biotinoyl tripeptide-1, and rosemary extract, which help energize follicles and support the growth phase. Niacinamide and panthenol keep the skin under the beard healthy, giving new hairs a good base to grow from. Hydrolyzed wheat protein and argan oil strengthen and condition each hair, so a patchy beard looks fuller. It also contains saw palmetto, which targets scalp hair loss but isn't what helps the beard. The serum contains wheat protein (gluten), so choose the Restore Serum if you have a wheat allergy.

MDhair Restore Serum

The Restore Serum contains copper tripeptide-1 and panax ginseng, which help nourish follicles and support denser growth. Hydrolyzed silk, rice, and oat proteins, together with biotin, strengthen beard hairs and reduce breakage. Castor, avocado, and argan oils soften coarse hair and moisturize the skin, which helps with beard itch and flaking. It's a good option for men with dry or sensitive facial skin.

MDhair Minoxidil 5%

For men who want the strongest option, MDhair Minoxidil 5% can be used on the beard off-label, as described above. The beard study used a 3% lotion [1], and higher strengths may be more likely to irritate facial skin, so start once a day and see how your skin reacts.

How to combine them

If you use minoxidil and a serum, apply the minoxidil first, let it dry fully, and then apply a full dropper of serum to the clean beard area. Use the serum once a day for at least 3 months. Stop any product that causes ongoing irritation.

What else can you do to grow a fuller beard?

Daily habits and nutrition set the foundation for any topical treatment.

Correct any deficiencies. Iron, zinc, vitamin D, and B vitamins all play a role in hair growth. A deficiency can slow growth, but taking extra when your levels are normal won't grow more hair [4].
Don't count on DHT-blocking supplements. Saw palmetto and pygeum help with scalp hair loss, but they don't boost beard growth.
Keep the skin healthy. Cleanse and moisturize daily. If you get ingrown hairs, gently exfoliate a couple of times a week.
Be patient with the "awkward stage." Many beards look patchy at 4–6 weeks and fill in as the hairs get longer and cover the gaps.
Sleep, manage stress, and eat a balanced diet. A healthy lifestyle supports hair growth and your overall well-being.

Key Takeaways

Genetics and androgen sensitivity are the main reasons some men grow thinner beards.
Topical minoxidil is the best-studied beard treatment, but using it on the face is off-label. Talk to your doctor before you start.
MDhair Regrowth and Restore Serums are not specifically indicated for beard growth, but their ingredients can support fuller, healthier-looking facial hair.
DHT blockers help the scalp, not the beard, because DHT is what drives beard growth.
Expect 3–4 months of daily use before you see results, and keep going to maintain them.
See a doctor if your beard has sudden bald patches or you have symptoms of low testosterone.

Frequently Asked Questions

Is it safe to use minoxidil on my beard?

For most healthy men, topical minoxidil is well tolerated on the face. The most common side effects are dryness, redness, and itching. Because beard use is off-label, check with your doctor first, especially if you have high blood pressure or a heart condition.

Will my beard fall out if I stop using minoxidil?

Some of the new growth may shed over the following months, especially fine hairs that haven't fully matured. Hairs that have become thick terminal hairs may be more likely to stay, but this varies from person to person. Plan to keep using it to maintain your results.

Can I use the MDhair Regrowth Serum on my beard?

Yes, you can. The Regrowth Serum is formulated for the scalp and isn't specifically indicated for beard growth, but ingredients like caffeine, rosemary, and biotinoyl tripeptide-1 can support fuller-looking facial hair. It contains wheat protein, so skip it if you have a wheat or gluten allergy.

Which is better for my beard, the Regrowth Serum or the Restore Serum?

Both can support beard growth. The Regrowth Serum focuses on energizing follicles with caffeine and rosemary. The Restore Serum focuses on nourishing and conditioning with copper peptides, ginseng, and plant oils, which makes it a good choice for dry or sensitive skin.

Do DHT-blocking supplements help beard growth?

No. DHT is the main hormone that drives beard growth, so blocking it doesn't help and may work against you. DHT blockers like saw palmetto are useful for scalp hair loss, not for the beard.

Does shaving make your beard grow back thicker?

No. Shaving cuts the hair at the surface and doesn't change the follicle. Stubble can feel coarser because the cut hair has a blunt tip, but it doesn't grow in thicker or faster.

How long does it take to grow a thicker beard with treatment?

With daily minoxidil, most men see results in 3–4 months, and results keep improving for up to a year. Non-medicated serums usually take at least 3 months of daily use.

Can I use minoxidil and a beard serum together?

Yes. Apply the minoxidil first, let it dry completely, and then apply the serum. Combining a medicated and a non-medicated product is a common approach for scalp hair loss, and the same idea applies to the beard.

Why is my beard patchy only on the cheeks?

Patchy cheeks are very common and usually genetic. The cheek follicles are often the last to respond to androgens, and some men's beards keep filling in until their late 20s or early 30s. Round, smooth bald spots, on the other hand, can be a sign of alopecia areata and should be checked by a dermatologist.

References

Ingprasert S, Tanglertsampan C, Tangphianphan N, Reanmanee C. Efficacy and safety of minoxidil 3% lotion for beard enhancement: A randomized, double-masked, placebo-controlled study. J Dermatol. 2016;43(8):968–969. doi:10.1111/1346-8138.13312
Randall VA. Androgens and hair growth. Dermatol Ther. 2008;21(5):314–328.
Kaiser M, Abdin R, Yaghi M, Gaumond SI, Jimenez JJ, Issa NT. Beard alopecia: An updated and comprehensive review of etiologies, presentation and treatment. J Clin Med. 2023;12(14):4793. doi:10.3390/jcm12144793
Almohanna HM, Ahmed AA, Tsatalis JP, Tosti A. The role of vitamins and minerals in hair loss: A review. Dermatol Ther (Heidelb). 2019;9(1):51–70.
Messenger AG, Rundegren J. Minoxidil: mechanisms of action on hair growth. Br J Dermatol. 2004;150(2):186–194.
Fischer TW, Hipler UC, Elsner P. Effect of caffeine and testosterone on the proliferation of human hair follicles in vitro. Int J Dermatol. 2007;46(1):27–35.
Panahi Y, Taghizadeh M, Marzony ET, Sahebkar A. Rosemary oil vs minoxidil 2% for the treatment of androgenetic alopecia: a randomized comparative trial. Skinmed. 2015;13(1):15–21.
Pickart L, Margolina A. Regenerative and protective actions of the GHK-Cu peptide in the light of the new gene data. Int J Mol Sci. 2018;19(7):1987.
Maurer M, Rietzler M, Burghardt R, Siebenhaar F. The male beard hair and facial skin – challenges for shaving. Int J Cosmet Sci. 2016;38 Suppl 1:3–9. doi:10.1111/ics.12328

Related Search Terms

minoxidil for beard growth, does minoxidil work on beards, is minoxidil for beard off-label, how to grow a thicker beard, patchy beard treatment, beard growth serum, best serum for beard growth, rosemary oil for beard, caffeine serum for beard, copper peptides beard growth, DHT and beard growth, does saw palmetto affect beard growth, minoxidil beard side effects, how long does minoxidil take for beard, MDhair Regrowth Serum for beard

Find the most effective hair growth products for you by taking the free hair assessment.