Saw palmetto is increasingly appearing in lists of "natural solutions" for hair loss. It is presented as a herbal alternative to finasteride, without the side effects many men fear. But is this perception accurate?
In this blog, we take an honest look at what saw palmetto is, what the research says, and for whom it might be worthwhile to try it.
What is saw palmetto?
Saw palmetto (Serenoa repens) is a palm tree that grows mainly in the southern United States. For centuries, the extract from its berries has been used in traditional medicine, particularly for prostate problems in older men.
The link to hair loss comes from the same mechanism as finasteride: saw palmetto is believed to inhibit the enzyme 5-alpha-reductase. This enzyme converts testosterone into DHT, the hormone that gradually damages hair follicles in cases of hereditary hair loss. Less DHT in the scalp theoretically means less hair loss.
What does the research say?
Frankly, the evidence is limited, but it does exist.
- A 2012 study, published in the International Journal of Immunopathology and Pharmacology, compared saw palmetto with finasteride in men with androgenetic alopecia. After two years, 68% of the finasteride group saw improvement in hair density, compared to 38% in the saw palmetto group.
- A smaller 2002 study in the Journal of Alternative and Complementary Medicine showed improvement in 60% of participants in the saw palmetto group, compared to 11% in the placebo group.
What you should take away from this: saw palmetto is not a fake ingredient. There is a mechanism, and there are studies. However, the evidence base is nowhere near as strong as that for finasteride or minoxidil, and the quality of the available studies is relatively poorer.
How does it compare to finasteride?
Finasteride is clinically proven to be effective for androgenetic alopecia. Several large, well-designed studies show that it reduces scalp DHT levels by about 60 to 70%, and that it stops or partially reverses hair loss in the majority of men.
Saw palmetto also appears to inhibit 5-alpha-reductase, but less powerfully and less consistently. The DHT reduction is lower and varies greatly between individuals. Those looking for an effect comparable to finasteride, but without medication, are likely to be disappointed.
The reason men turn to saw palmetto is understandable. Finasteride has potential side effects, including sexual complaints like reduced libido or erectile dysfunction. These occur in a minority of users, but the fear of them is real. That makes the search for alternatives logical.
Are there side effects of saw palmetto?
Saw palmetto is generally well-tolerated. The most commonly reported side effects are mild stomach upset, especially when taken on an empty stomach.
There are also reports of an effect on libido with long-term use, although this is less documented than with finasteride. Furthermore, caution should be exercised if you are taking blood thinners, as saw palmetto can affect blood clotting.
The idea that saw palmetto has no side effects at all is therefore too simplistic. It is mild, but not without risk for everyone.
How to use it?
Most studies showing positive results used doses of 200 to 320 mg of standardized extract per day. When purchasing, ensure that the product is standardized for fatty acids and sterols, as the quality of saw palmetto supplements varies widely. A cheap, unstandardized product will do little to nothing.
A realistic timeframe is at least 3 to 6 months before you can assess whether it is working. Hair growth is slow, and responses to treatments vary greatly from person to person. Those who see no results after six weeks and then stop have never truly given saw palmetto a chance.
For whom is it useful?
Saw palmetto is a serious consideration if you have hereditary hair loss in its early stages and prefer not to use medication. If your hair loss is still mild, you can try saw palmetto as a conservative first step, with a realistic expectation of perhaps stabilization, rarely regrowth.
It is less suitable if you already have visible bald spots and genuinely want to address them. In that case, saw palmetto is likely too weak to turn the tide.
Saw palmetto as an addition to a hair growth routine is also an option. It works through a different mechanism than serums that directly stimulate the hair follicle, so they are not mutually exclusive.
Combining with a hair serum
Ingredients such as Redensyl and Procapil found in hair growth serums work by directly stimulating hair follicle stem cells. This means you can use saw palmetto and a hair serum together without affecting each other's effects.
If you want to start addressing your hair loss but want to avoid medication, a combination of a hair growth serum and a conscious scalp routine is a logical starting point. Check out the Hairborn Growth Serum to learn what's in it and how its active ingredients target your hair follicles.
Summary
Saw palmetto is not nonsense, but it's not a miracle cure either. It has some scientific evidence behind it as a mild DHT blocker, but its effectiveness is lower and less predictable than finasteride. It is an option for men who consciously choose a conservative approach, with realistic expectations.
Whatever you choose, timing remains important. The earlier you start with hereditary hair loss, the more follicles can still be saved. Waiting until it's really visible makes any treatment harder.
Frequently asked questions
Can you use saw palmetto with finasteride?
Consult a doctor before starting, as both work through a similar mechanism and the combination could theoretically lead to a stronger DHT-blocking effect, which could also influence the risk of side effects. There is no extensive research on this specific combination.
Is saw palmetto in oil form as effective as in capsule form?
Most studies showing an effect used standardized capsules with a known concentration of fatty acids, which is less consistently guaranteed with oils. If you choose oil, check whether the product is also standardized, otherwise the active amount will be unclear.
Can saw palmetto also be applied topically to the scalp?
There are products with saw palmetto extract for topical use on the scalp, but most research into its effectiveness has been done with oral supplementation. Topical application is less well-researched for actual hair loss effects.
Does saw palmetto affect your blood testosterone levels?
Saw palmetto appears to primarily inhibit the local conversion of testosterone to DHT, with a limited effect on overall blood testosterone levels in most users. Large systemic hormonal shifts have not been consistently demonstrated in research.
Is saw palmetto safe to combine with alcohol?
There is no strong known direct interaction between saw palmetto and alcohol, but excessive alcohol consumption can contribute to similar stomach complaints as saw palmetto sometimes causes, making it harder to pinpoint the cause of symptoms.
Can you use saw palmetto if you have a prostate condition?
Always discuss this with your doctor, as saw palmetto was originally studied for prostate complaints and can have its own effect on the prostate. In the case of an existing prostate condition, medical advice is more important than for healthy users.
Is there a difference between saw palmetto from berries and synthetic variants?
Yes, natural extracts from the berries have been studied more often than completely synthetic variants of the active ingredients. Most available studies used a standardized, natural extract, so there is the most evidence for that.
Can you combine saw palmetto with a dermaroller?
Yes, saw palmetto as an oral supplement has no known interaction with the use of a dermaroller on the scalp, as one works systemically and the other locally and mechanically. You can include both in your routine.
Why is saw palmetto often called a "natural alternative"?
Saw palmetto is often positioned as natural because it comes from a plant, which sounds more appealing to many people than a synthetic medicine, even though its origin says nothing about the strength of the evidence. Natural origin and clinical evidence are two different things that are easily confused.
Can you use saw palmetto if you are not yet 25?
There is no specific age limit for saw palmetto, but as with other hair loss treatments, it is more beneficial if hair loss has already been clearly established. If in doubt at a young age, consult a doctor about the best approach for your situation.
