You've tried the things that sit on top of your scalp. This one goes in.
Shampoos rinse off in about a minute. Supplements travel through your entire body before any measurable amount reaches a follicle. TREVO uses 0.5 mm 24K-gold tips to open temporary channels in the upper scalp and place the serum inside them — one session a week, three weeks on, one week off.
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on, one off
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The ingredient was never the problem. Getting it past the skin was.
Your scalp's outer layer exists to keep things out, and it is very good at it. A shampoo has about sixty seconds before it goes down the drain. A supplement has to cross your bloodstream and get past every other organ with a claim on those nutrients before any measurable amount arrives at a follicle.
Micro-infusion skips the queue. Ultra-fine 24K-gold 0.5 mm tips open temporary channels in the upper scalp and deposit the serum inside them. The channels close within a couple of hours. What went in stays where the follicle is.
Dermatology clinics have used this route for years. TREVO is a version built for use at home.
How a session works
Results from real customers
Submitted by customers with written permission and published unretouched. Photographs are taken by customers at home, so lighting, background and angle vary between frames. Individual results vary and are not guaranteed. Customers who submit photos are not paid.
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Why Experts Believe in Micro-Infusion
Micro-infusion is designed to help deliver active ingredients directly where they're needed most — at the scalp and around the hair follicles. By combining targeted delivery with a precision microneedling approach, it offers a more direct alternative to simply applying another serum or shampoo and hoping for the best.
"Micro-infusion is one of the most effective ways to deliver active ingredients directly to the follicles, where real hair growth happens."
"Unlike traditional topical products that remain primarily on the surface, micro-infusion creates a more direct pathway for scalp-targeted ingredients. That's what makes this approach so exciting."
"The future of hair restoration is moving toward more targeted delivery. Micro-infusion is an innovative approach designed to get active ingredients where conventional application methods may fall short."
The specialists featured above serve as paid advisors to TREVO and are compensated for their professional time and expertise. Their opinions relate to the micro-infusion delivery method.
Before you buy
The details, in full
3,400+ reviews · 4.7 average
"Three months in. The part line is noticeably narrower and I've stopped seeing hair in the shower drain."
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"Three months in and the thin patch at my crown has basically closed up. Wish I'd started sooner."
"Way less hair in the shower drain within a few weeks. Painless, takes a few minutes, and it actually works."
Why not the alternatives?
A comparison of delivery routes and practicalities, not of clinical outcomes.
90-day money-back promise
Start with three months
That's the shortest window in which most people can fairly judge a hair treatment. If it hasn't done anything for you by day 90, send it back.
Shop the SystemYour part line has been getting wider. It doesn't have to keep going.
Female thinning is usually diffuse rather than patchy, which is why it hides for years and then seems to arrive all at once. TREVO delivers peptides and growth-supporting nutrients into the scalp itself, in a single-vial session once a week for three weeks, then a week off.
Drug-free. No prescription. Safe with coloured and chemically treated hair.
guarantee
on, one off
verified reviews
Four common reasons women's hair thins — and where TREVO fits
Hair thinning doesn't always look the same. Find the pattern that sounds most like yours.
Thickening shampoos work on the hair. This works on the scalp.
Volumising products coat the strand you already have. They make hair look fuller in the mirror and change nothing at the root.
Ultra-fine 24K-gold needles open thousands of temporary micro-channels in the upper scalp and place the serum inside them. The channels close within hours; what was delivered stays where the follicle is.
It is the same delivery route used in dermatology clinics, built for use at home and for hair you don't want to shave, tie back or hide while you use it.
How a session works
Results from real customers
Submitted by customers with written permission and published unretouched. Photographs are taken by customers at home, so lighting, background and angle vary between frames. Individual results vary and are not guaranteed. Customers who submit photos are not paid.
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The questions women ask us most
The details, in full
3,400+ reviews · 4.7 average
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"My colourist noticed the regrowth at the crown before I mentioned I was using anything."
"I was nervous about micro-infusion, but the process is painless and quick. Just a few minutes once a week, and my scalp already looks healthier and fuller."
Why not the alternatives?
A comparison of delivery routes and practicalities, not of clinical outcomes.
90-day money-back promise
Start with three months
Hair grows slowly enough that nothing shorter tells you anything. If it hasn't done anything for you by day 90, send it back.
Shop the System