Dutasteride Vs PRP: How They Compare For Hair Loss
Last reviewed on 29 September 2026. We review our treatment guides every six months to keep them accurate.
Key points
They work in completely different ways. Dutasteride is a daily tablet that lowers the hormone (DHT) driving male pattern hair loss, so it treats the cause. PRP (platelet-rich plasma) is a course of injections made from your own blood that stimulates the follicles, but does nothing to the hormone.
So they are not really rivals. Because one tackles the cause and the other supports the follicles, they act at different points and are often used together rather than being a straight either-or choice.
Dutasteride is the most potent DHT blocker there is. It blocks both forms of the enzyme that makes DHT, cutting it by around 92 per cent, which is why it is especially good at stopping, and sometimes partly reversing, further loss.
In the UK, dutasteride for hair is off-label. It is licensed for an enlarged prostate, not hair loss, so using it for hair is a prescriber’s off-label decision; PRP is a drug-free procedure.
PRP has more limited, mixed evidence and is a supportive add-on. It stimulates the follicles you still have, drug-free, but neither its evidence nor its effect matches a potent DHT-lowering tablet for tackling the cause.
Neither adds hair or restores a bald scalp. Both work on hair that is still there, so neither can regrow a genuinely bald area, and for that a hair transplant is the only option that adds hair.
Both are ongoing commitments. Dutasteride only works while you take it, and PRP needs repeated maintenance sessions, so with either the benefit fades if you stop. Which suits you, or whether to combine them, is best decided with a clinician.
Dutasteride and PRP are two very different options for male pattern hair loss: one is a powerful hormone-lowering tablet, the other a procedure that injects your own blood into the scalp. Because they work in different ways, comparing them is less about which is "better" and more about understanding what each one does, which is why they are often combined rather than chosen between.
This guide compares dutasteride and PRP neutrally: what each is, how they differ, how effective they are, what they cost you in commitment and money, who each suits, and how they fit together. It is general information and not a substitute for advice from a doctor.
The short answer
Dutasteride and PRP target hair loss at different points, so they are better seen as complementary than as competitors. Dutasteride is a drug that lowers DHT, the hormone that causes male pattern loss, more powerfully than any other, so it treats the underlying cause and is especially good at holding on to hair, though for hair it is used off-label. PRP is a procedure that concentrates the growth factors from your own blood and injects them to stimulate the follicles you still have, without touching the hormone, and its evidence is more limited. If you had to choose one, dutasteride tackles the root of the problem most strongly; but PRP is drug-free and appeals to people who cannot or would rather not take a DHT-lowering drug, and many use PRP alongside it. Neither, though, can regrow a scalp that is already bald.
What is dutasteride?
Dutasteride is a once-daily tablet that treats male pattern hair loss by lowering DHT, the hormone that shrinks genetically sensitive follicles. There are two forms of the DHT-making enzyme, type I and type II; dutasteride blocks both, which is what makes it the most potent option. As a 2025 network meta-analysis describes, it "inhibits both type I and type II 5-alpha-reductase, resulting in a 92 per cent reduction in serum dihydrotestosterone (DHT)", a bigger fall than finasteride achieves, and the analysis ranked it the most effective single medicine for hair density. In the UK it is licensed for an enlarged prostate rather than hair loss, so using it for hair is off-label. It works on the cause of the loss rather than the symptoms, which is why it is such a strong option. Our guide on dutasteride for hair loss covers it in detail, including the possible side effects, and finasteride versus dutasteride compares it with the more commonly used first-line tablet.
What is PRP?
PRP, platelet-rich plasma, is a procedure rather than a drug. A small sample of your blood is spun in a centrifuge to concentrate the platelets, and the resulting plasma is injected into the scalp. As a review of PRP for hair loss describes, its "composition encompasses a rich variety of biological components such as platelets, growth factors, cytokines, and other bioactive proteins", and those growth factors stimulate the follicle. The evidence is encouraging but mixed: the review found that "the majority of studies demonstrated that PRP is effective in increasing hair density and thickness in patients with" androgenetic alopecia, while cautioning that "results varied due to differences in preparation protocols, platelet concentration, and delivery methods". Crucially, PRP does nothing to lower DHT, so it supports the follicles without addressing the hormonal cause, and it is drug-free. Our guide on PRP injections for hair loss explains it further.
Which is more effective for hair loss?
For tackling the cause of male pattern loss, dutasteride is the more powerful and better-evidenced option. It lowers the DHT driving the loss more than any other drug, and is especially effective at stopping or slowing further thinning, and in many men partly reversing it. PRP, by contrast, has a more limited and variable evidence base: the PRP review found most studies show it can improve hair density and thickness, but stressed that results vary with how it is prepared and delivered.
The more useful point, though, is that they are not really measuring the same thing. Dutasteride is best at protecting and improving the hair you have by cutting the hormone at source; PRP is aimed at giving the follicles a stimulating boost, drug-free. That is why, rather than choosing the "winner", many people who want to do more than one thing use PRP as an add-on to dutasteride. On its own, dutasteride is the more powerful and better-evidenced choice; PRP alone is a reasonable option mainly for those who cannot or would rather not take a DHT-lowering drug.
Dutasteride vs PRP: how do they compare?
The two are very different in almost every practical way:
What they are: dutasteride is a daily prescription tablet (a drug); PRP is a course of in-clinic injections made from your own blood (a procedure).
How they work: dutasteride lowers DHT, the hormonal cause of male pattern loss, more than any other drug; PRP delivers growth factors to stimulate the follicles but does not affect DHT.
What they are best at: dutasteride is best at stopping or slowing further loss, and often partly reversing it; PRP is aimed at boosting the density of thinning areas.
Evidence and status: dutasteride has strong evidence as the most potent DHT blocker, though it is used off-label for hair in the UK; PRP has more limited and mixed evidence and is usually a supportive add-on.
Drug or drug-free: dutasteride is a systemic hormonal medicine taken daily; PRP is drug-free and uses only your own blood, which is part of its appeal.
Commitment: dutasteride is a daily tablet with a long-lasting effect in the body; PRP is an initial course of injections with maintenance top-ups. Both fade over time if you stop.
What neither does: neither adds new hair or restores a bald area, so both are for keeping and supporting the hair you still have rather than replacing hair that is gone.
Which is right for you?
If your aim is to tackle male pattern loss at its source with the most powerful option, dutasteride is the strongest choice, because it lowers DHT more than any other drug and is particularly good at holding on to, and sometimes improving, your hair, bearing in mind that for hair it is used off-label and is a systemic hormonal medicine. PRP is a reasonable choice if you cannot take a DHT-lowering drug, would prefer a drug-free option, or want to add a follicle-stimulating boost on top of it, and it appeals to people who like that it uses only their own blood. For many, the sensible answer is not one or the other but a plan that may include both. Neither, though, suits someone whose loss is advanced or whose follicles are already gone, because both only work on hair that is still there.
Because dutasteride is a potent prescription medicine used off-label for hair and PRP is a clinical procedure with variable evidence, it is worth discussing either with a clinician, who can weigh up your pattern of loss, your feelings about a hormonal drug, and whether combining treatments makes sense for you.
Can they be combined with other treatments?
Yes, and this is where dutasteride and PRP make the most sense together rather than as alternatives. Because dutasteride treats the cause and PRP supports the follicles, using both means tackling the loss from two directions at once, and PRP is commonly used as an add-on for people already taking a DHT-lowering tablet. Dutasteride sits among the medical mainstays alongside finasteride and minoxidil, which we compare in our guides on finasteride versus dutasteride and dutasteride versus minoxidil; and PRP sits within the wider set of injectable options covered in our guide on PRP versus PRF.
Neither can restore hair that is already gone. Where loss is more advanced, a hair transplant is a separate option that redistributes your own permanent hair, and both dutasteride and PRP are often used around a transplant to protect and support the result; our guide on hair transplant versus PRP looks at that. The key point is that dutasteride and PRP are usually part of a wider plan, not a single cure.
The bottom line
Dutasteride and PRP are very different tools that work at different points in male pattern hair loss. Dutasteride is a daily tablet that lowers DHT more powerfully than any other drug and treats the cause, with strong evidence and a particular strength in stopping and sometimes reversing loss, though for hair it is used off-label. PRP is a course of injections made from your own blood that stimulates the follicles but does not touch the hormone, with more limited and mixed evidence, and it is drug-free and generally used as a supportive add-on. Neither adds hair or restores a bald area, and both fade if you stop.
If you had to choose one, dutasteride has the stronger evidence and tackles the root of the problem most powerfully, while PRP is best seen as a drug-free complement or as an option for those who cannot take a DHT-lowering drug. A clinician can help you decide which, or whether a combination, suits your hair loss, and how it might fit alongside other treatments or a hair transplant.
Frequently asked questions
Is dutasteride or PRP better for hair loss?
For tackling the cause of male pattern loss, dutasteride is the more powerful and better-evidenced option, because it lowers the DHT that causes the loss more than any other drug and is especially good at stopping further thinning, though for hair it is used off-label. PRP has more limited, mixed evidence and works differently, stimulating the follicles without affecting the hormone, so it is usually a drug-free supportive add-on rather than a first choice. They are not really rivals, though: many people use PRP alongside dutasteride, and PRP alone mainly suits those who cannot or would rather not take a DHT-lowering drug.
What is the difference between dutasteride and PRP?
Dutasteride is a daily tablet, a drug that lowers DHT, the hormone behind male pattern hair loss, more powerfully than any other, so it treats the underlying cause. PRP is a procedure in which a sample of your own blood is spun and the concentrated plasma injected into the scalp to stimulate the follicles with growth factors, without changing your hormones. So dutasteride works on the cause from the inside, while PRP supports the follicles from the outside; one is an everyday medicine, the other a course of drug-free clinic injections.
Can you use dutasteride and PRP together?
Yes, and they are often combined. Because dutasteride treats the hormonal cause and PRP stimulates the follicles, using both tackles the loss from two angles, and PRP is commonly added on for people already taking a DHT-lowering tablet. Combining treatments is a decision to make with a clinician, who can advise whether it is worthwhile for your pattern of loss, but there is no reason in principle that the two cannot be used alongside each other.
Do dutasteride or PRP regrow hair on a bald scalp?
No. Both work on follicles that are still present: dutasteride by cutting the hormone that shrinks them, PRP by stimulating them. Neither can grow hair where the follicles have already been lost, so neither will restore a genuinely bald or fully receded area. For that, a hair transplant is the only option that adds hair to bare scalp. Dutasteride and PRP are best used earlier, to keep and support the hair you still have, rather than as a cure for baldness.
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