RU58841 5/8% 50/100ml
This product is sold as a raw material for further formulation and research. It does not include usage instructions or claims regarding specific outcomes. This product is a raw material and not sold for human use/consumption. If we discover a customer uses this product for human use/topical use the customer will be permanently banned off the website. This is a raw material and under no circumstances may be used for human consumption
What is RU-58841?
Non steroidal androgen receptor antagonist. It is a research compound, not an approved medicine.
What to expect, honestly
Some shedding in the first weeks is common as follicles reset. Loss typically settles before anything visibly grows. The earliest fair verdict is around six months — judged on photographs, not memory.
Suitability & safety
For research use only. Not for human or veterinary consumption, and not a drug, cosmetic or medical device. Read the batch documentation and speak to a professional if you are unsure.
Batch & storage
Every bottle is stamped with its batch number, blend date and expiry. Store it cool, dry and out of direct light — this is a compound that degrades, and heat and daylight are what degrade it.
What people actually report.
Unedited accounts from people using this. Individual results and timelines vary.
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jakub9 July 2026, 6:40 pm
Great service, package here in 3 days
Verified buyer
Folliva Labs repliedCheers, glad it turned up quick.
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Sven9 July 2026, 1:05 am
tried loads of stuff over the years and this is the first that actually held the line
Verified buyer
Folliva Labs repliedGlad it stuck for you where the others didnt. Cheers.
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Emre J.7 July 2026, 11:31 pm
package took a bit longer but got here fine
Verified buyer
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D.W.5 July 2026, 8:44 pm
posting this just to check the reviews here arent fake. if you can see it then they let it through, so the site seems legit 🙂 feel free to remove it, im ordering now
Verified buyer
Folliva Labs repliedHa, thanks for keeping us honest, and welcome. Order whenever youre ready, and if you have any questions before or after, just email us. Kind regards, Folliva Labs
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Finn G.3 July 2026, 5:56 pm
stopped my recession dead. wish i found this years ago
Verified buyer
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Henrik D.26 May 2026, 7:43 pm
legit seller, fast delivery
Verified buyer
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sander8812 May 2026, 11:32 pm
my barber noticed the temples filling in before i did lol
Verified buyer
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Julius Kaiser3 May 2026, 1:29 pm
quick delivery cheers
Verified buyer
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Karim2 May 2026, 3:45 am
quik and easy, will order again
Verified buyer
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Rasmus Z.28 April 2026, 8:59 am
came off fin because of the sides, no sides with this and my hairline is holding. relieved honestly
Verified buyer
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finn24 April 2026, 5:20 am
Product is fine, no issues. Only thing is i emailed a question and it took over a week to get back to me, was around new year to be fair
Folliva Labs repliedSorry for the slow reply, that was the christmas week and we fell behind. Back to normal now, thanks for bearing with us.
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B19 April 2026, 2:18 am
scalp used to get flaky, way better now and the hair feels stronger
Verified buyer
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Vytautas Z.12 April 2026, 2:00 am
asked a question by email, replied same day. good
Folliva Labs repliedAnytime, ask us whatever you need.
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Anonymous12 April 2026, 12:40 am
quick replies when i asked about the dose
Verified buyer
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Georgi Peeters9 April 2026, 12:37 am
good
Verified buyer
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K.J.7 April 2026, 4:11 pm
ordered late at night, shipped next morning
Verified buyer
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rasmus31 March 2026, 8:17 pm
Received today, well packaged
Verified buyer
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georgi24 March 2026, 4:30 pm
holding steady, no new bald patches which is a win at my age
Verified buyer
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Julius19 March 2026, 5:03 am
slow going but the fall has definitely eased off
Verified buyer
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T.R.18 March 2026, 6:29 pm
smooth order fast ship
Verified buyer
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Nils15 March 2026, 6:58 am
arrived well packed, no issues
Verified buyer
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gubbe7 March 2026, 4:56 pm
happy customer, quick turnaround
Verified buyer
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the_stig887 March 2026, 3:19 am
Top, kam schnell an
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Tomas Muller23 February 2026, 1:54 am
early days, maybe 6 weeks, less falling out already though
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Emre22 February 2026, 9:27 pm
Thx for the quick shipping!!
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Stefan8 February 2026, 4:55 pm
6 months, thicker on top, no more seeing scalp under bright lights
Verified buyer
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Youssef K.8 February 2026, 12:34 pm
Took about two weeks to turn up and the tracking sat frozen for days, was getting annoyed ngl. product itself is good but the wait sucked
Verified buyer
Folliva Labs repliedReally sorry about that one. It got stuck at customs and sat far too long. We sent you a second bottle free straight away. Anytime a tracking number stops moving for a few days just email us and we sort it.
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Omar T.1 February 2026, 10:48 am
Very friendly and quick, thanks!
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Rasmus S.31 January 2026, 4:46 am
Thanks! got here faster than i thought
Verified buyer
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P30 January 2026, 1:10 am
Alles bestens, danke
Verified buyer
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Ivan R.21 January 2026, 10:35 pm
definetly ordering again
Verified buyer
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H10 January 2026, 5:56 pm
temples looked rough, now theres baby hairs filling them in. made up
Verified buyer
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Youssef Novak10 January 2026, 1:47 am
no problems at all, recommend
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S.B.9 January 2026, 8:05 pm
reordered, same good service
Folliva Labs repliedCheers for coming back.
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kacper_p8 January 2026, 11:34 pm
came in a plain box, perfect
Verified buyer
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hansi_13 December 2025, 8:36 pm
Schnelle Lieferung, danke!
Verified buyer
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Marek30 November 2025, 10:12 am
discreet package, appreciated
Verified buyer
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David Muller22 November 2025, 9:19 am
finasteride wrecked my libido, this gave me zero sides. huge for me
Verified buyer
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Mateusz13 November 2025, 11:03 pm
no fuss, on time
Verified buyer
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Oskar A.11 November 2025, 4:06 am
only a couple weeks in so cant really say yet, no complaints though. will update
Verified buyer
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oskar31 October 2025, 9:01 am
small hairs coming in at the temples, cant complain
Verified buyer
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Aleksander R.4 October 2025, 8:19 pm
Received within the week, all good
Verified buyer
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Tobias26 September 2025, 12:03 pm
keeps my hair as long as im consistent, skip a week and i can tell
Verified buyer
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lucas26 September 2025, 6:06 am
Greitas pristatymas, ačiū
Verified buyer
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Z.J.16 September 2025, 1:46 pm
bit of regrowth at the corners after 5 months, buzzing with that
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jaybee15 September 2025, 7:20 am
crown looks thicker in my photos, slow but its moving
Verified buyer
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Oskar13 September 2025, 1:02 pm
danke, schnell geliefert
Verified buyer
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Sander13 September 2025, 1:16 am
solid stuff, been the only thing to touch my crown
Verified buyer
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Tomas T.10 September 2025, 11:59 am
9 months on it now, hairs better than its been in years. im 24, started losing it at 19
Verified buyer
Folliva Labs repliedClass, really glad its working out for you. Cheers for the write up.
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karim9 September 2025, 5:23 am
cheap enough and it works, cant ask for more
Verified buyer
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Diego29 August 2025, 7:28 pm
works if you actually use it every day, its not magic
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Lars Novak26 August 2025, 1:34 pm
got here in 4 days to lithuania
Verified buyer
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henrik16 August 2025, 8:28 am
been on it half a year, take a pic every month, the difference month 1 to now is real
Verified buyer
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Z.B.13 August 2025, 6:07 pm
good stuff quick delivery
Verified buyer
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Theo12 August 2025, 4:33 am
3 months in and the hairloss has basically stopped. happy with that
Verified buyer
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david11 August 2025, 10:29 am
first month i thought it was making it worse, turns out thats normal. month 4 now and its clearly better
Verified buyer
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Niklas M.30 July 2025, 2:05 pm
Fast and discreet, thank you
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lars29 July 2025, 6:07 am
top service
Verified buyer
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two_stroke22 July 2025, 12:50 pm
Perfect, thanks
Verified buyer
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Miguel H.13 July 2025, 11:04 pm
not a miracle but my hair looks fuller than it did, ill take it
Verified buyer
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Omar J.6 July 2025, 7:31 pm
bit slow to ship but no harm done
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Niklas27 June 2025, 8:51 pm
Prompt delivery no complaints
Verified buyer
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M27 June 2025, 3:14 pm
got my package, thanks team
Verified buyer
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emre_3426 June 2025, 6:49 pm
everything smooth, cheers
Verified buyer
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V19 June 2025, 12:16 pm
hairline stopped moving back, thats honestly all i wanted
Verified buyer
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Edvinas D.2 June 2025, 12:12 pm
arrived sealed with a date on it, good to see
Verified buyer
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Rasmus29 May 2025, 5:00 am
third time buying here, always solid
Verified buyer
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Sami K.26 May 2025, 7:44 am
good comms and fast dispatch
Verified buyer
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N.K.22 May 2025, 12:21 pm
started this after two years of fin then minox. fin held my hair but messed with me too much so i stopped. minox was great for like 8 months then all the hair i saved started falling out at once, was grim. this was kind of a last try. first couple months nothing, then around month 3 the shed stopped and by month 6 there was actual regrowth on the crown. not 18 year old hair but way better. one less thing to stress about
Verified buyer
Folliva Labs repliedThanks for writing all that out, genuinely useful for people reading. Glad youre in a better spot with it.
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Sami G.22 May 2025, 7:18 am
used to weigh out my own powder and it was a nightmare, this is way easier and the same every time
Verified buyer
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z3ke20 May 2025, 4:34 am
all good, sealed properly
Verified buyer
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Ruben J.28 April 2025, 11:35 am
shipping quick, product as described
Verified buyer
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Mikkel Jansen27 April 2025, 5:29 am
shed like crazy the first month and nearly stopped, glad i didnt, its calmed right down now
Verified buyer
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Mateusz N.13 April 2025, 3:52 pm
honestly was skeptical, expected nothing, quietly surprised its working
Verified buyer
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Unknown12 April 2025, 3:00 am
Livraison rapide, merci
Verified buyer
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Theo Kaiser9 April 2025, 2:38 am
the itch went away first, then the shedding slowed down. good so far
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Tijn M.29 March 2025, 6:35 am
no more hair in the drain in the mornings, big difference for me
Verified buyer
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Mantas27 March 2025, 5:26 am
ordered monday, here by thursday. nice
Verified buyer
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L22 March 2025, 3:45 pm
Nice
Verified buyer
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D9 March 2025, 6:58 pm
a bit greasy if you use too much, less is more. otherwise happy
Verified buyer
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M.W.26 February 2025, 7:09 am
took me ages to find somewhere in the EU that ships RU without the customs nightmare, so glad i found these guys
Verified buyer
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Antoine J.15 February 2025, 3:51 pm
Snelle levering, bedankt
Verified buyer
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nils_k14 February 2025, 7:01 pm
cheers guys
Verified buyer
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Ruben Vos11 February 2025, 7:18 pm
classic shed then regrowth, you just have to be patient with it
Verified buyer
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Antoine Vos8 February 2025, 5:40 pm
my hairline was creeping back fast, its stopped now. thats enough for me
Verified buyer
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Bartek25 January 2025, 9:16 pm
im 28, been thinning since 22, its finally slowed down after 4 months
Verified buyer
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Julius K.17 January 2025, 9:40 pm
regrowth is patchy but its there, more than the pills ever did
Verified buyer
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Vytautas P.9 January 2025, 12:00 am
Super quick, thanks alot
Verified buyer
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T.K.6 January 2025, 9:12 am
fast shipping, thx
Verified buyer
Write a review
What DHT does.
Not stress. Not your shampoo. Not the water. In a genetically susceptible scalp, one hormone repeats the same instruction every growth cycle — and every time, the hair comes back a little thinner. Here is the chain, and where this breaks it.
- 01
DHT reaches the follicle
Testosterone converts into DHT. In a susceptible scalp it binds to androgen receptors inside the follicle. The receptor is the lock. DHT is the key.
- 02
The follicle shrinks, cycle by cycle
Every time that key turns, the growth phase gets shorter. Hair returns finer, shorter, weaker. This is miniaturisation — and it runs quietly for years before a mirror admits it.
- 03
RU-***** occupies the lock
It is a topical androgen receptor antagonist. It sits in the receptor so DHT cannot deliver its instruction — on the scalp, at the exact place the damage happens.
- 04
It stays where you put it
Applied to skin, it is designed to act locally — rather than lowering DHT across your entire body the way a pill does.
Why waiting is the expensive part
A miniaturised follicle can still recover. A follicle that has finished the process cannot. Every cycle you wait, more of the first group quietly joins the second. That isn't a sales tactic. It's arithmetic.
Why minoxidil alone isn't enough
Minoxidil pushes growth. It does nothing to the signal causing the loss. It is the accelerator, not the brake — you end up growing hair into a headwind.
What this actually is
RU-***** is a research compound, not an approved medicine, and we won't pretend otherwise. What we can be held to is the bottle: we blend it at 5% ourselves in the EU, in small batches, and we print the batch number, the blend date and the expiry on it. For a compound that degrades in time and light, knowing how old yours is matters more than most sellers would like you to think about.
Nothing happens immediately. That's normal.
Hair moves on a biological clock, not a marketing one. Here is the honest sequence — including the part that makes most people quit too early.
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WEEKS 0–4
Baseline — and maybe a shed
Take your first photographs. Some people shed more in the early weeks as follicles reset their cycle. It reads like failure. It usually isn't.
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MONTHS 1–2
The shedding settles
Loss slows before anything grows. This is the stage most people never get past, because they quit in week three.
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MONTHS 3–4
First new growth
Fine, pale hairs at the hairline and temples. Easy to miss without your baseline photo — which is exactly why you took it.
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MONTHS 6+
An honest verdict
Six months is the earliest point a fair judgement is possible. Compare photographs, not memories.
The options, side by side.
The common ways men treat male-pattern hair loss, compared on mechanism, side effects, evidence and cost.
| Feature | RU-58841Topical antiandrogen | MinoxidilTopical growth stimulant | Oral finasterideSystemic DHT blocker | Ketoconazole shampooTopical antifungal | Natural topicalsCaffeine, rosemary, saw palmetto | Doing nothingBaseline |
|---|---|---|---|---|---|---|
| Mechanism | ||||||
| What it acts on | The androgen receptor | Potassium channels, blood flow | 5-alpha-reductase. Lowers DHT | Fungus. Mildly, the receptor | Several weak effects. None well mapped | |
| Where it acts | Scalp | whole body | Whole body | Scalp | Scalp | |
| Side effects | ||||||
| No systemic or sexual side effects | NoDesigned to break down before it reaches the blood. No human data proves that it does. | YesNot a hormonal drug. Rare heart-rate effects at high doses. | NoLower libido and erectile problems in a minority of men. Most recover after stopping. Some report that they did not. | YesTopical, barely absorbed | YesNothing here reaches your bloodstream in any amount that matters | Yes |
| No scalp irritation | PartlyThe alcohol carrier can dry or sting. That is the vehicle, not the compound. | NoItching and flaking are common. Mostly the propylene glycol. | YesIt never touches your scalp | PartlyCan dry the scalp with regular use | YesThe gentlest column here. In the rosemary trial, less itching than minoxidil. | Yes |
| What it does | ||||||
| Blocks DHT | Yesfully, at the receptor | NoIt grows hair by a different route entirely | YesLowers DHT at the source | PartlyA weak antiandrogen at best | PartlySaw palmetto is a weak 5-alpha-reductase inhibitor | No |
| An antiandrogen you apply, not swallow | Yes | NoTopical, but not an antiandrogen | NoAn antiandrogen, but a tablet | PartlyTopical, weakly antiandrogenic | PartlyTopical. Weakly, and only through saw palmetto. | |
| Stimulates new growth on its own | NoIt takes the brake off. It adds nothing. | YesThis is the one thing it is for | NoSame as ours: it removes suppression | No | PartlyA little, in small trials. Nothing like minoxidil. | |
| Also treats the scalp itself | No | No | No | YesClears the flaking and inflammation nothing else here touches | PartlySome anti-inflammatory effect. It is not an antifungal. | |
| Evidence and approval | ||||||
| An approved medicine for hair loss | NoA research compound. No approved human use, anywhere. | YesApproved for male-pattern hair loss | YesApproved, on prescription | PartlyApproved as an antifungal, not for hair loss | NoCosmetics. Nobody has taken them through approval. | |
| Human evidence behind it | NoNo completed human trials. None. | YesDecades of randomised trials | YesDecades of randomised trials, and the largest measured effect of anything on this table | PartlyA handful of small studies | PartlyOne small trial matched rosemary oil to 2% minoxidil. Caffeine has a few. That is all of it. | |
| Available without a prescription | YesOnly because there is no approved use to prescribe | YesOver the counter | NoPrescription only. A doctor has to agree. | Partly1% over the counter. 2% is usually a prescription. | YesAny shop, any time | |
| Living with it | ||||||
| If you stop | Loss resumes | Shedding within weeks | Loss resumes | The flaking comes back | Back to baseline | |
| Daily effort | Once a day | Twice a day | One tablet | Two or three times a week | Daily, or every wash | None |
| Cost per month, roughly | €25–50 | €20–60 | €10–20 | €5–10 | €10–25 | €0 |
A comparison of mechanisms, not medical advice. Minoxidil and finasteride are approved medicines with decades of randomised trials behind them, and finasteride has the largest measured effect of anything here. RU-58841 is a research compound: no approved human use, no completed human trials, and therefore no side-effect rates to quote for it — only the way it was designed. The natural column covers topical caffeine, rosemary oil and saw palmetto, where the human data is real but thin. Prices are rough monthly estimates and vary by dose and brand. Speak to a doctor before you start or stop anything.
Questions, answered.
When will I see results?
Most people notice less shedding within the first 4–8 weeks, and new growth from around month 2–3. Give it a full 3–6 months before you judge it.
Why did my shedding get worse at first?
Early shedding is common as follicles reset their growth cycle. It looks like the product is failing. It is usually the opposite — and it settles.
Are there side effects?
Because it stays on the scalp, it avoids the systemic side effects linked to oral DHT blockers. As with anything new, patch-test first and stop if you react.
How do I know it's genuine?
We blend it ourselves in the EU — it is not rebottled, not dropshipped, and it does not sit in a warehouse. Every bottle carries its batch number, blend date and expiry, so you always know how old the thing in your hand is. RU-58841 degrades with time; a fresh batch matters more than most people realise.
Shipping and returns?
Shipped from the EU, usually 3–5 days. Unopened bottles can be returned within 14 days.