DHT and Hair Loss

Meet DHT: The Hormone Behind Most Hair Loss

If you want to understand why hair loss happens - and why some products work while others don't - you need to understand DHT. Dihydrotestosterone is the single most important factor in the most common type of hair loss, and grasping how it works clarifies a lot of confusion, including why an antioxidant supplement like Restolin can't do what a DHT-targeting treatment can.

What DHT Is and Where It Comes From

DHT is an androgen - a male-type hormone, though present in everyone. It's produced from testosterone by an enzyme called 5-alpha reductase. DHT has important normal functions in the body, but in the scalp, for genetically susceptible people, it's the culprit behind pattern hair loss. Importantly, it's not about having "too much" testosterone or DHT overall - it's about the genetic sensitivity of your hair follicles to DHT's effects.

How DHT Causes Follicle Miniaturisation

Here's the core process. In genetically sensitive follicles, DHT binds to androgen receptors and triggers a gradual shrinking called miniaturization. With each hair cycle, the affected follicle produces a slightly thinner, shorter, weaker hair, and the growth phase shortens. Over years, robust terminal hairs become fine, wispy "vellus" hairs, and eventually the follicle may stop producing visible hair altogether.

This explains the characteristic pattern: follicles in certain areas (the temples and crown in men, the top of the scalp in women) are more DHT-sensitive, so those areas thin first, while DHT-resistant follicles (often at the back and sides) are typically spared. It's why hair transplants work - resistant hairs relocated to thinning areas keep their resistance.

Can You Block DHT?

Yes - and this is the basis of one of the most effective hair-loss treatments. Finasteride is a prescription medication that inhibits 5-alpha reductase, reducing the conversion of testosterone to DHT. By lowering DHT, it can slow, halt, and partially reverse pattern hair loss for many people, with solid clinical evidence. Dutasteride is a related, stronger inhibitor used in some cases.

These are genuine DHT-targeting treatments - but they're prescription drugs, not supplements, and they require a doctor's involvement. They also come with potential side effects that need discussing, ongoing-use requirements, and variable results. They're not for everyone, but for the right person they directly address the root cause of pattern hair loss.

The Truth About 'Natural DHT Blockers'

The supplement market is full of products claiming to be natural DHT blockers, most commonly featuring saw palmetto, plus ingredients like pumpkin seed oil or green tea. The independent assessment: the evidence for these is weak and inconsistent compared to proven medications. Some small studies suggest saw palmetto might have a modest effect, but it's nowhere near the strength of evidence behind finasteride, and results are unreliable.

Two points matter here. First, if a supplement blocked DHT as effectively as medication, it would carry the same potential hormonal side effects - you can't have strong effects without the risk of side effects. Second, Restolin is not a DHT blocker at all - it's an antioxidant formula and doesn't claim to target DHT. So while some supplements market themselves as DHT blockers, be skeptical of the claim, and don't expect Restolin to work through that mechanism.

What This Means for Your Approach

1. If you have pattern hair loss and want to target the cause, DHT-reducing medication (with a doctor) has the strongest evidence.
2. Be skeptical of supplement 'DHT blocker' claims - the evidence is weak and the marketing often overstated.
3. Understand that antioxidant supplements like Restolin don't target DHT, so they can't reverse genetic hair loss.
4. See a doctor to confirm your hair loss is genetic (pattern) rather than another cause before choosing treatment.
5. Consider evidence-based options (finasteride, minoxidil) as the core of a pattern-hair-loss plan, with supplements as optional support only.

The Bottom Line

DHT is the hormone behind most hair loss, gradually miniaturising genetically sensitive follicles until they stop producing visible hair. This explains the pattern of hair loss, why it's progressive, and - crucially - why the treatments that work against it are those that reduce DHT or act on the follicle directly. Antioxidant supplements like Restolin don't target DHT, so they can't reverse genetic hair loss, however they're marketed. If pattern hair loss is your concern, understanding DHT points you toward the evidence-based options and a conversation with your doctor.