No more counting what’s in the brush. No more checking your part in every bathroom mirror. Signal 5 is a drug-free, five-peptide scalp serum that supports thicker, fuller-looking hair while your body comes back to itself — in sixty seconds a day.
The 90-day empty bottle promise. Use all three bottles. If you can’t see a difference, send back the empties and we refund you in full. You have the upside and none of the downside.
Because the shed you’re seeing today was set in motion two to four months ago. That’s the single most useful thing to know about this: it’s a delayed signal, not a current emergency. Full explanation just below — it’s the part most people find genuinely reassuring.
Eight to twelve weeks for most women. The first thing you’ll notice is what’s not in the drain — the shed easing is the earliest and best sign, and it usually shows up before any new growth does.
Ten actives, all disclosed: sh-Polypeptide-1, -9, -11, sh-Oligopeptide-2, -10, arginine, rosemary, saw palmetto, Scutellaria baicalensis, eucalyptus. Each one is listed further down with what it does.
No — it’s a lightweight scalp serum, not an oil. One dropper, ten seconds of massage, then style or sleep as normal. Colour-safe, because it goes on the scalp rather than the lengths.
Log in, two clicks, done. You can also pause or push the next delivery back a month. Or buy one-time and never hear from us about billing at all.
This one fact resolves almost everything that’s been confusing about it. You feel fine now. The deadline passed, the illness cleared, the hard season ended. So why is this happening now? Because hair runs on a delay.
of your hairs are actively growing at any given moment
can shift into the resting phase together after a physical or emotional stressor
is how long before you actually notice — the delay that makes it feel random
hairs a day during a shed, against a typical 100
Figures on telogen effluvium per Harvard Health Publishing.
Three or four months before this started, what was happening? A brutal quarter at work. A course of antibiotics. A bout of flu you pushed through. A breakup, a move, a diet, a loss, a night you stopped sleeping properly and never quite started again.
That’s your trigger. And the reason that matters is simple: it’s already behind you.
What you’re watching now is the echo, not the event. Your follicles aren’t damaged and they aren’t gone — a large group of them simply moved into rest at the same time and are now clearing out together. Which means the interesting question stops being “what’s wrong with me” and becomes a much better one: what can I give them on the way back?
Right now you wash your hair and then you count. You look at your hands, you look at the drain, you decide whether today was better or worse than Tuesday. Imagine simply washing your hair. Rinsing. Getting out. Thinking about literally anything else.
Not styling defensively. Not choosing the part that hides the most. Not angling away from the overhead light in the meeting room. Just pulling it back on a hot day and walking out of the house without running the calculation first.
This is the real one. Somewhere in the last few months your hair became a background process running all day. The goal isn’t hair you admire — it’s hair you stop thinking about, so that attention goes back to the things you’d rather spend it on.
You did the hard part already. You got through the thing that caused this.
Signal 5 is what you give your scalp on the way back.
Two things help a recovering scalp: the message that says grow, and the conditions that make it easy to. Signal 5 delivers both, straight to the scalp, in one dropper.
Your body already talks to follicles using peptides — short chains of amino acids carrying the instructions to grow, rest and shed. Signal 5 contains five biomimetic peptides: lab-made copies of those same signalling proteins. And because they go on your scalp rather than into your stomach, they arrive where the follicles are instead of travelling through your whole body first.
New growth comes in easier on a healthy scalp. Arginine supports microcirculation — blood flow to the follicle. Rosemary, the most-studied botanical in this category, supports the scalp environment. Scutellaria calms. Eucalyptus gives you that clean, cool finish you’ll feel on application.
One sends the message. The other makes the ground good.
Sixty seconds a day, at the only place it matters.
In a randomised controlled trial of 100 patients (Panahi Y et al., Skinmed, 2015), rosemary oil was compared against minoxidil 2%. At six months, both groups showed a significant increase in hair count, with no significant difference between them — and scalp itching was significantly more frequent in the minoxidil group. Worth knowing: that result appeared at six months, not three, and the comparison was against 2% rather than 5%. This is research on the ingredient, not on Signal 5.
Mark the calendar. This is the sequence most women report, in the order they report it.
You’ll notice this on day one — the eucalyptus gives a light cooling lift as it absorbs. Sixty seconds, no residue, and you’re done. The habit takes about four days to become automatic.
Better conditioned, less tight, calmer. It’s a small thing and it’s the first real signal that something is being actively done rather than waited out.
This is the one you’re waiting for, and it usually arrives before any new growth does. Less in your hands after washing. Less on the pillow. The count you’ve been running all these months quietly stops being interesting — and that’s the moment most women say they exhaled.
Short, wispy, standing straight up, impossible to style, and the best thing you’ll see all month. Check your part and temples in daylight. This is the visible proof, and it’s the photo everyone sends us.
Take a photo of your part in daylight, same window, phone at the same height. Progress at this pace is real but gradual, and memory is a genuinely terrible measuring instrument. In ten weeks that photo is how you’ll actually see what changed — and it’s what most women wish they’d taken.
You’re going to research this before you buy it — we’d be surprised if you didn’t. So here’s the complete list up front, with the job each one does. Nothing tucked inside a blend name.
sh-Polypeptide-1 · -9 · -11 · sh-Oligopeptide-2 · -10
Lab-made copies of the signalling proteins your body uses to tell follicles when to grow. The five in Signal 5.
Rosmarinus officinalis
The most-studied botanical in this category, and the one with the trial behind it. Supports a healthy scalp environment.
L-Arginine
An amino acid supporting scalp microcirculation — blood flow to where the follicle actually sits.
Baikal skullcap root
Antioxidant and soothing botanical. Keeps a stressed, reactive scalp calm and comfortable.
Serenoa repens
A botanical extract long used in scalp formulas to support ongoing density.
Eucalyptus globulus
Scalp comfort and the light, clean finish. This is the cooling lift you feel on application.
Six reasons this works for someone with no spare capacity for another routine.
Not a five-step system. Not something that has to dry before you can sleep. One dropper, ten seconds of massage, and you’re back to your evening. It fits into the routine you already have instead of asking you to build a new one you’ll abandon by week three.
A pill has to travel through your entire system to reach your head. This goes directly where the follicles are — which is also why there’s nothing to swallow, nothing to remember with meals, and nothing entering your bloodstream.
Ten actives, all disclosed, each with its purpose. You’re the kind of buyer who reads the label and then reads about the label. We’d rather give you the whole thing up front and let you go and verify it.
A lightweight serum, not an oil. It absorbs rather than sitting on the surface, and it goes on the scalp rather than the lengths, so your colour is untouched. Wear it under a workday, or apply at night and sleep on it.
No prescription, no minoxidil, nothing acting on your hormones. If you’ve been putting this off because every option seemed to require a doctor’s appointment you don’t have time to book, this is the one you can start tonight.
Log in, two clicks, done. No chat window, no “call us to cancel”, no retention maze. Push a delivery back a month if you’re still working through bottles. Or buy one-time and never hear from us about billing.
Dry or towel-dried. Part where you normally do, then make a second and third parting either side so the dropper can reach scalp.
One full dropper, in small amounts along each parting and around the hairline. On scalp, not on hair.
Fingertips, circular pressure, ten seconds. Don’t rinse. Style as normal or go straight to bed.
You’ve probably been circling this category for a while now — supplements, prescriptions, a dermatologist appointment you keep meaning to book. Here’s where Signal 5 sits.
| Signal 5 | Hair-growth pills | Prescription topicals | Salon & scalp treatments | |
|---|---|---|---|---|
| Drug-free | Yes | Yes | No | Yes |
| Non-hormonal | Yes | Check the label | Varies | Yes |
| Something you swallow | No | Yes | Sometimes | No |
| Goes where the follicles are | Yes — straight to the scalp | Travels through the whole body first | Yes | Surface only |
| Every active disclosed | All ten, on the label | Often a proprietary blend | Yes | Rarely |
| Prescription needed | No | No | Yes | No |
| Daily time cost | 60 seconds | Seconds, but daily and ongoing | 1–2 minutes | A salon appointment |
| Typical cost | From $50/month | $79+/month | $15–$60/month plus appointments | $60–$150 per session |
| Cancel in two clicks | Yes | Varies | — | — |
Signal 5 is a cosmetic scalp serum, not an FDA-approved drug. One practical note worth acting on: if you haven’t had bloods done recently, ask your doctor for a thyroid panel and a ferritin level — not just “iron”. Both are common, both are easily fixed, and it’s worth knowing either way.
Use all three bottles as directed. If at ninety days you can’t see a difference against the photo you took in week one, send back the empties and we refund you in full. Not store credit — your money.
Ninety days rather than thirty, because ninety days is when you’ll actually know. That’s the whole point of a guarantee: it should outlast the doubt.
Often, yes — and that’s genuinely good news, because it means you’re working with your body rather than against it. What Signal 5 does is support the scalp through that recovery: peptide signalling at the follicle, better microcirculation, a calmer and better-conditioned scalp for new growth to come through. You’re not buying a rescue. You’re buying better conditions for a comeback that’s already trying to happen — plus the considerable relief of doing something instead of watching.
Two markers, in this order. First, the shed easing — less in your hands after washing, less on the pillow. That usually comes first, somewhere in weeks four to eight. Second, baby hairs: short wispy regrowth along your part and temples at eight to twelve weeks. Take a daylight photo of your part in week one and compare at week ten. That comparison is far more reliable than memory.
Peptides are how your body signals follicles in the first place — that part isn’t marketing, it’s basic hair biology. Biomimetic peptides are lab-made copies of those signalling proteins, and applying them at the scalp puts them where the follicles are rather than asking a capsule to route them through your entire system first. That directness is the whole argument for a topical over a pill.
It’s a lightweight serum, not an oil, and it absorbs rather than sitting on the surface. One dropper, ten seconds, style as normal. Plenty of women apply it at night and simply forget about it — by morning there’s nothing to see or feel.
Yes. It goes on the scalp rather than the lengths, so your colour is untouched. If you colour at a salon, just apply after your appointment rather than the same morning.
Yes — shampoo, conditioner, heat protectant, styling products all sit fine alongside it. It goes onto a dry scalp and stays there. If you use a prescription topical, ask the doctor who prescribed it about spacing, since they know your regimen.
Give it a full ninety days — that’s the honest window and it’s why the three-bottle supply is the one most women choose. After that, plenty of women continue for ongoing density support, especially if life is likely to throw another stressful stretch at them. Others stop once things have settled. Both are fine, and you can pause any time.
Use all three bottles as directed, and if you can’t see a difference against your week-one photo, send back the empties for a full refund. You keep the upside and we carry the risk.
Yes, and it’s worth doing regardless — ask specifically for a thyroid panel and a ferritin level rather than just “iron”. Both are common, both are straightforward to correct, and knowing either way puts you back in control of the picture. Use the serum alongside; there’s no conflict.
Yes. Signal 5 is one formula — five biomimetic peptides plus five botanicals and amino acids. What changes between life stages is which part of the story is most relevant to you. We think one honest formula beats three differently-packaged versions of the same bottle.
We’re new, and we’d rather say so than open with a wall of reviews you’d be right to question. Here’s what going first gets you:
Results show at eight to twelve weeks, which is exactly why the 90-day supply is the one most women choose — and why it’s the one covered by the empty bottle promise.
The shed you’re watching started months ago, and it’s already on its way out. What happens next — how the regrowth comes in, and what your scalp has to work with while it does — is the part that’s still in front of you.
Sixty seconds a night, starting whenever the bottle lands on your doorstep.