Does CBD Oil Help With Hair Loss and Hair Growth?

Yes, research suggests CBD oil may help with hair loss and hair growth. In a 2021 case series published in the journal Cannabis, 35 adults with androgenetic alopecia applied a CBD-rich topical to thinning areas once each morning for six months. Hair counts rose an average of 93.5%, and every single participant showed regrowth. A 2023 follow-up study from the same researchers, using a stronger hemp extract, reported average increases of 246% in men and 127% in women. Scientists believe topical CBD may work by blocking CB1 receptors on hair follicle cells, an action lab research links to longer hair shafts, while its anti-inflammatory properties and fatty acids support a healthier scalp. Here's what the research found, how to use CBD on your scalp, and what to expect.

The Short Answer

•        Does it work? Two published studies found meaningful regrowth in every participant after six months of daily topical use.

•        How much? The 2021 study used just 3 to 4 mg of CBD per day, applied as a thin layer to thinning areas.

•        How fast? Six months of consistent daily use. Both studies measured results at the six-month mark.

•        How to apply? Directly to the scalp, left on. Not a rinse-out shampoo.

•        Why it may work: CBD dampens CB1 receptor signaling on hair follicle cells, which lab research connects to longer hair shafts.

Does CBD Help With Hair Loss?

Research suggests it can. Two published case series have now measured hair regrowth in people using topical CBD, and both reported gains in every participant.

The first, published in Cannabis in 2021 by Dr. Gregory Smith and researcher John Satino, followed 35 adults diagnosed with androgenetic alopecia, the most common form of hair loss. Each participant received a CBD-rich hemp topical in a 2 oz jar and applied a thin layer once each morning to areas of thinning. They were free to keep using blow dryers, conditioners, and their usual hair products. Jars were replaced monthly across the six-month study.

The results, broken out by region of the scalp:

Combined across both regions, hair counts climbed an average of 93.5%, from 18.5 hairs to 32.7 hairs per square centimeter. The result was statistically significant, and every participant gained hair.

The same researchers published a follow-up in the International Journal of Trichology in 2023, this time using a hemp extract containing THCV and CBDV alongside CBD at a higher daily dose. Across 31 participants, average hair count increased 246% in men and 127% in women over six months. An independent physician reviewing before-and-after photographs found visible scalp coverage improvement in every subject.

Both were case series, which is the stage where promising treatments get their first real-world measurement. Larger controlled trials are underway.

How Might CBD Affect Hair Follicles?

CBD may support hair growth by quieting CB1 receptors on hair follicle cells, an action lab research links to longer hair shafts.

Your body runs an endocannabinoid system, a regulatory network that helps manage inflammation, cell growth, and tissue repair. Hair follicle cells carry CB1 receptors as part of that system. When those receptors get activated, research shows hair shaft growth slows down and follicles move toward their resting phase sooner.

CBD does the opposite. It acts as what researchers call a negative allosteric modulator of CB1, meaning it dampens that signal rather than firing it. Turn the CB1 signal down, and lab studies show hair shafts elongate. That's the mechanism the study authors point to as the likely explanation for the regrowth they measured.

CBD also interacts with TRPV1 receptors, which help govern the hair growth cycle, and appears to influence Wnt signaling, a pathway involved in forming new hair follicles and keeping hair in its active growth phase. It's a completely different route than minoxidil or finasteride take, which is why the study authors suggest CBD could complement those treatments rather than compete with them. Talk to your doctor or dermatologist before combining anything.

Does CBD Help With Scalp Health?

CBD may support scalp health in two ways: by calming inflammation, and by helping balance oil production.

Healthy hair starts with a healthy scalp, and inflammation is one of the most common things standing in the way. CBD is a well-documented anti-inflammatory, which is why it shows up in research on conditions like psoriasis and dermatitis. Calming that inflammation may create better conditions for follicles to do their work.

Moisture balance matters just as much. A landmark 2014 study published in the Journal of Clinical Investigation found that CBD may help normalize sebum production in human skin, acting as what researchers call a sebostatic agent. For your scalp, that balance is the goal: less of the excess buildup that clogs follicles, while CBD's own fatty acids condition and nourish the skin. We've written before about how CBD may help with dry skin, and the scalp responds to the same properties.

CBD also carries antioxidants and omega fatty acids from the hemp plant, which may add to its conditioning effect on hair and scalp alike.

How Much CBD Should You Use on Your Scalp?

A little goes a long way. Participants in the 2021 study used only 3 to 4 mg of CBD per day, spread as a thin layer across thinning areas. One 2 oz jar lasted roughly a month.

That's genuinely good news for anyone comparing costs against other hair treatments. You don't need to saturate your scalp, and you don't need to reapply throughout the day. A thin, consistent morning application is what produced the results in the research.

Start with a modest amount, apply it the same way each day, and give it time. Consistency did more work in these studies than volume.

How Do You Use CBD Oil for Hair Growth?

Apply CBD oil directly to your scalp and leave it on. That's the method that produced results in both published studies.

Here's the routine:

1.     Coat your fingertips with a thin layer of CBD oil.

2.     Massage it into your scalp, working across the full area where you want growth. Focus on the crown and hairline, the two regions that responded best in the research.

3.     Leave it on. The study protocol called for a morning application that stayed on the scalp all day. Absorption time appears to be what matters.

4.     Repeat daily. Both studies used once-daily application for six full months.

5.     Style as usual. Participants were explicitly cleared to keep using blow dryers, conditioners, and their normal products.

Do CBD Shampoos Work for Hair Growth?

Leave-on CBD oil is the format backed by research. Every published study on CBD and hair regrowth used a topical that stayed on the scalp, not a product that washed down the drain.

Shampoos and rinse-out treatments aren't likely to sit on the scalp long enough for CBD to absorb into follicles. If you enjoy a CBD shampoo, use it. Just pair it with a leave-on CBD topical if regrowth is the goal, and make sure whatever you use is third-party lab tested so you actually know how much CBD you're getting.

How Long Does It Take to See Results?

Plan on six months of daily use. Both published studies measured results at the six-month mark, and that's the realistic window for any hair treatment.

Hair follicles cycle on their own schedule. They move through active growth, transition, and resting phases over months, not weeks. Apply consistently every morning, mark your calendar, and take a photo at the start so you have something to compare against. Some participants noticed light shedding in the first few weeks as follicles cycled, which had settled by the two-month visit.

The people who saw results in the research were the ones who stuck with it.

Should You Take CBD Orally Too?

Many people pair a topical with a daily tincture or capsule. Topicals go to work where you apply them, while an oral product may help CBD build up throughout your system and support the whole-body inflammatory balance that scalp health depends on. Our CBD tinctures and capsules both work for this.

Start with a lower dose and increase gradually as you learn how your body responds. If you take prescription medication, check with your doctor first, since oral CBD can interact with certain drugs.

How Do You Choose a Quality CBD Product?

Look for third-party lab testing, and buy from a brand that publishes its results.

The CBD market is crowded with celebrity-backed hype products that can't tell you what's actually in the bottle. Lab testing is the only way to verify both quality and CBD content, and any brand worth your money will make those reports easy to find.

At Urban Roots Hemp Co., every CBD product is tested by independent labs for potency and purity, and our lab results are published on our site. We're a Michigan small business with multiple first-place High Times Cannabis Cup wins, and we make a full range of tinctures, topicals, capsules, edibles, and CBD for pets so you can build the routine that fits your goals.

Questions about dosage, products, or where to start? Reach out to our team any time. We're here to help you through your CBD journey.

Frequently Asked Questions About CBD for Hair

Does CBD oil help with hair loss?

Research suggests it may. A 2021 case series of 35 adults with androgenetic alopecia found hair counts increased an average of 93.5% after six months of once-daily topical use, with regrowth in every participant. A 2023 follow-up study using a stronger hemp extract reported average increases of 246% in men and 127% in women.

How might CBD affect hair follicles?

Hair follicle cells carry CB1 receptors, and activating them slows hair shaft growth. CBD may work in the reverse direction, acting as a negative allosteric modulator that dampens CB1 signaling, an action lab research links to longer hair shafts. CBD also interacts with TRPV1 receptors that help govern the hair growth cycle.

How much CBD should you put on your scalp?

Participants in the 2021 study used 3 to 4 mg of topical CBD per day, applied as a thin layer to areas of thinning. One 2 oz jar lasted about a month. Consistency matters more than quantity.

What is the best way to use CBD oil for hair growth?

Massage a thin layer of CBD oil directly into your scalp once each morning and leave it on. That leave-on method is what both published studies used.

Do CBD shampoos work for hair growth?

Leave-on CBD oil is the format backed by research. Rinse-out products aren't likely to stay on the scalp long enough for CBD to absorb into follicles, so pair a shampoo with a leave-on oil if regrowth is your goal.

How long does CBD take to work on hair?

Six months of daily use. Both published studies measured results at the six-month mark, which matches how slowly hair follicles naturally cycle.

Can CBD help with a dry or irritated scalp?

CBD is a documented anti-inflammatory and was shown in a 2014 Journal of Clinical Investigation study to help normalize oil production in human skin. Combined with hemp's natural fatty acids, that may support a balanced, conditioned scalp.

Can you use CBD with minoxidil or finasteride?

The study authors note CBD works through pathways entirely different from minoxidil and finasteride and suggest it could complement them. Check with your doctor or dermatologist before combining treatments.

Which CBD products are best for hair and scalp?

A leave-on CBD oil or topical applied to the scalp, ideally paired with a daily tincture or capsule. Choose products that are third-party lab tested so you know exactly how much CBD you're getting.