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One of the most common questions I hear in hair restoration is:
“Is there something natural I can take instead?”
Sometimes there is evidence for a natural or plant-derived treatment.
Sometimes there isn't.
But before getting into rosemary oil, saw palmetto, pumpkin seed oil, biotin and hair supplements, I think we need to talk about the word natural.
A plant is natural.
A concentrated extract of that plant, processed in a factory and compressed into a 400 mg capsule, is a manufactured treatment.
That doesn't make it bad.
It just means we should judge it the same way we judge any other treatment:
What is actually in it? What dose are you getting? Does it work? Is it safe? And is there good evidence behind it?
The first question isn't “What supplement should I take?”
It's:
Why are you losing your hair?
Male and female pattern hair loss are different from iron deficiency, thyroid disease, postpartum shedding, rapid weight-loss-related shedding, alopecia areata and inflammatory or scarring forms of hair loss.
A supplement cannot fix the wrong diagnosis.
At FORM Face + Body, that is why I start with an assessment of the scalp, the pattern of loss and the patient's history before recommending treatment.
Natural remedies can sometimes have a role.
But diagnosis still comes first.
This is where I think patients should be a little skeptical.
Saw palmetto is a plant.
But when you swallow a saw-palmetto tablet, you are not eating the plant. You are taking an extract that has been processed and concentrated.
The same is true of pumpkin seed oil capsules, herbal blends and many “hair vitamins.”
With a properly standardized product, we may know how much of a particular extract or marker compound is present.
With other products, the name of the ingredient may tell you much less about the amount of the biologically active compounds you are actually receiving.
That matters because the clinical study showing benefit from one specific standardized extract at one specific dose does not automatically prove that every bottle with the same plant name on the front works the same way.
In Canada, licensed natural health products carry a Natural Product Number, or NPN, and Health Canada requires information about ingredients, dose, quality and recommended use. [1]
If you are going to use a supplement, I would at minimum look for an NPN and use a reputable product.
But even an approved natural health product should not automatically be considered equivalent to a prescription medication supported by large, long-term clinical trials.
Rosemary oil probably has the most social-media attention of any natural hair-loss treatment.
And there is some evidence behind it.
A small randomized study of 100 people with androgenetic alopecia compared rosemary oil with 2% minoxidil over six months. Hair counts increased in both groups by six months, with no significant difference between them. [2]
That sounds impressive.
But there are several reasons to keep it in perspective.
It was one relatively small study. There was no placebo group. And 2% minoxidil is not necessarily the treatment I would choose today for many patients with pattern hair loss.
So I would not interpret that study as proof that:
“Rosemary oil works just as well as minoxidil.”
A better conclusion is:
Rosemary oil is interesting, there is some clinical evidence suggesting benefit, and we need better studies.
If a patient wants to use it as an adjunct and their scalp tolerates it, I don't have a philosophical objection to it.
I just don't want it replacing a treatment with stronger evidence when progressive hair loss is occurring.
Pumpkin seed oil is another natural product with some surprisingly interesting data.
In one randomized, placebo-controlled study, 76 men with androgenetic alopecia were given either 400 mg of pumpkin seed oil daily or placebo for 24 weeks.
The pumpkin seed oil group had a significantly greater increase in hair count than the placebo group. [3]
There have also been smaller studies in women.
This makes pumpkin seed oil more interesting than many supplements marketed for hair loss.
But again, one or two small studies are not the same as decades of evidence.
I would put pumpkin seed oil in the category of:
promising, reasonable to discuss, but not yet a replacement for established therapy.
Possibly.
Saw palmetto is often promoted as a “natural DHT blocker.”
There is some biological rationale for that description, and several small clinical studies have suggested potential benefit in androgenetic alopecia. A systematic review found encouraging results with both topical and oral saw-palmetto products. [4]
But the evidence is substantially weaker than it is for finasteride.
One two-year comparative study found improvement in 38% of men taking saw palmetto compared with 68% taking finasteride. [5]
That study also had limitations, but it illustrates an important point:
Calling something a “natural finasteride alternative” does not make it equivalent to finasteride.
If a patient does not want to use a prescription DHT blocker, we can discuss alternatives.
But I think the trade-off should be explained honestly.
Topical caffeine is another interesting option.
Laboratory research suggests caffeine may affect hair-follicle biology, and clinical studies have reported improvements in shedding or hair growth.
A recent systematic review identified nine clinical studies involving 684 patients. The results generally favoured topical caffeine, but the quality of evidence was mostly low or very low, with problems including poor study design, lack of control groups and even unclear caffeine concentrations in some products. [6]
So caffeine shampoo is not nonsense.
But it also isn't established treatment simply because caffeine sounds familiar and harmless.
I would view it as an adjunct.
No.
This is probably the biggest misconception in the supplement world.
Biotin deficiency can cause hair problems.
But true biotin deficiency is uncommon.
A 2024 review looked specifically at oral biotin for hair growth. Only three suitable studies were identified, and the best-quality trial found no difference between biotin and placebo. [7]
The evidence simply does not support routinely giving high-dose biotin to everyone with thinning hair.
There is another problem.
Large doses of biotin can interfere with certain laboratory tests, including some thyroid and cardiac blood tests.
So taking a supplement you may not need can actually create medical confusion.
If you are deficient, replace the deficiency.
If you aren't, more biotin does not automatically mean more hair.
This is different.
Hair follicles need adequate nutrition.
Iron, vitamin D, zinc and other nutrients have all been studied in patients with hair loss, and deficiencies may contribute in selected patients. [8]
If someone has a true deficiency, correcting it makes sense.
But that does not mean everybody with hair loss needs iron, zinc and vitamin D supplements.
More is not always better.
Some nutrients can actually cause problems when taken in excess. High levels of selenium, for example, have been associated with hair loss. Excess vitamin A can also contribute to alopecia.
My rule is straightforward:
Supplement a deficiency. Don't guess at one.
That is why targeted bloodwork may be helpful in selected patients, particularly when the history suggests nutritional deficiency, dietary restriction, rapid weight loss or diffuse shedding.
This is where the evidence gets more complicated.
There are multi-ingredient hair supplements containing combinations of botanical extracts, vitamins, marine proteins, antioxidants and other compounds.
Some have randomized controlled trials showing improvements in hair density.
A 2026 network meta-analysis looked at 19 randomized trials involving more than 1,600 patients and found that several supplements, including standardized botanical formulations, pumpkin seed oil and other nutraceutical combinations, showed evidence of benefit. [9]
That is encouraging.
But there are two problems.
First, many of these products contain multiple ingredients. If the treatment works, it can be difficult to know which ingredient caused the improvement.
Second, studies may investigate a specific proprietary formulation. You cannot assume another supplement containing vaguely similar ingredients will produce the same result.
I therefore view nutraceuticals as possible adjuncts, not magic hair pills.
No.
This may be the most important misconception.
Anything that has a biological effect can potentially have a side effect.
Herbal products may interact with medications.
Essential oils can irritate the scalp or cause allergic reactions.
Supplements can affect blood tests.
Vitamins and minerals can be harmful at excessive doses.
And perhaps the biggest risk is simply losing time.
Androgenetic alopecia is progressive.
If someone spends three years treating progressive miniaturization with vitamins and oils that are not controlling the underlying problem, we may eventually be trying to restore hair that could have been preserved.
That matters.
There is often a small study behind almost every viral hair-loss remedy.
For example, onion juice has an old small study suggesting benefit for alopecia areata, which is an autoimmune form of patchy hair loss.
That does not mean onion juice treats male pattern baldness.
Similarly, one very small study involving only nine men found an increase in hair thickness after standardized scalp massage.
Interesting?
Yes.
Enough evidence for me to prescribe scalp massage as a treatment for androgenetic alopecia?
No.
One of the most important skills in reading hair-loss research is asking:
Was this actually studied for the kind of hair loss I have?
My view is fairly simple.
Rosemary oil: reasonable evidence of possible benefit, but still limited.
Pumpkin seed oil: promising clinical data, particularly for androgenetic alopecia, but more research is needed.
Saw palmetto: biologically plausible with some clinical evidence, but less effective and less well studied than established DHT-blocking medication.
Topical caffeine: interesting and probably safe for most people, but current evidence remains limited.
Biotin: useful when someone is deficient; poorly supported as a routine hair-growth supplement.
Iron, vitamin D, zinc and other nutrients: treat documented or clinically meaningful deficiency rather than taking them blindly.
Multi-ingredient nutraceuticals: some have encouraging trials, but formulations vary and they are best considered adjuncts.
A recent 2026 review in the Journal of the American Academy of Dermatology reached a similar overall conclusion: some adjunctive treatments appear to provide modest benefit, but much of the evidence is limited by small studies, different formulations and inconsistent methods. [10]
That is probably the fairest summary of the entire field.
I am not opposed to natural treatments.
I am opposed to replacing evidence with marketing.
If there is evidence behind a treatment, I am happy to discuss it.
If a patient wants to add rosemary oil, pumpkin seed oil or another reasonable adjunct to a properly constructed treatment plan, that may be completely appropriate.
But I would not let the word natural distract us from the important questions.
What kind of hair loss do you have?
Is it progressing?
Is there a nutritional deficiency?
Is there a medical cause?
What treatment has the best chance of preserving the hair you still have?
At FORM Face + Body in Toronto, that is where our hair-restoration assessment begins.
Not with the supplement.
Not with the device.
And not with the marketing claim.
We start with the diagnosis, then build the treatment around the evidence.
Sometimes that includes a natural treatment.
Sometimes it doesn't.
Hair loss has many causes, and supplements or topical products are not appropriate for every patient. Natural health products can cause side effects and interact with medications. Individual assessment may be required before starting treatment. This article is educational and is not a substitute for personal medical advice.
written by
Dr. Michael Brandt is a Royal College-certified Otolaryngology – Head and Neck Surgeon specializing in facial plastic and reconstructive surgery. He is fellowship-trained in facial plastic surgery and serves as an Assistant Professor at the University of Toronto, where he contributes to surgical education and research.
