Your follicles talk in signals.
We put five of them in a bottle.
Signal 5 is a drug-free, five-peptide scalp serum. No hormones, nothing swallowed, and every one of its ten actives printed on the label. Sixty seconds a day, right where the follicles are.
- Drug‑free
- Non‑hormonal
- Nothing ingested
- Colour‑safe
Same bottle. Different reason you’re holding it.
Shedding has different causes at different points in life, and what’s useful to know changes with it. Pick the one that sounds like you and we’ll take you to the page written for it.
After having a baby
Usually months 3–6 postpartum
The sudden, alarming shed nobody warned you about — and why the leading topical drug is off the table while you’re nursing.
The postpartum page → 02After a stressful stretch
Burnout, illness, a hard season
The shed that shows up months after the difficult part ended — and why that delay is the most reassuring thing about it.
The stress page → 03Through perimenopause
Usually 40–55
The widening part and lighter ponytail that arrive with the hormonal transition — without going near your hormones.
The menopause page →None of the above, or not sure? That’s fine — the product is identical either way. Skip straight to the price, or email hello@tryquietsignal.com and a person will answer.
Peptides are how your body signals a follicle to grow.
That part isn’t marketing, it’s hair biology. Your body uses peptides — short chains of amino acids — to carry the instructions telling follicles when to grow, rest and shed.
Five biomimetic peptides
Lab-made copies of those same signalling proteins. The five that Signal 5 is named after.
Applied at the scalp
A capsule travels through your whole body to reach your head. This goes straight where the follicles are.
On ground worth growing in
Arginine for microcirculation, rosemary and Scutellaria for a healthy, calm scalp environment.
Sixty seconds a day
One dropper along the part, ten seconds of massage, done. Non-greasy, colour-safe, no rinsing.
Pills have to travel through your whole body to reach your scalp.
This goes straight there.
Ten actives. Every one printed on the bottle.
No proprietary blend, no “complex” hiding the list. Here it is, with what each one does.
The signal — five biomimetic peptides
- sh‑Polypeptide‑1
- A copy of a growth-factor protein your body uses to signal follicles.
- sh‑Polypeptide‑9
- Supports the microvascular environment around the follicle.
- sh‑Polypeptide‑11
- Supports the follicle’s growth-phase signalling.
- sh‑Oligopeptide‑2
- Supports the cellular environment at the follicle base.
- sh‑Oligopeptide‑10
- Supports normal scalp renewal.
The support — botanicals & amino acids
- Arginine
- Supports scalp microcirculation — blood flow to the follicle.
- Rosemary (Rosmarinus officinalis)
- The most-studied botanical in this category. Supports a healthy scalp.
- Saw Palmetto (Serenoa repens)
- A botanical long used in scalp formulas for ongoing density support.
- Scutellaria baicalensis
- Antioxidant and soothing. Keeps an irritated scalp calm.
- Eucalyptus
- Scalp comfort and the light, clean finish you’ll feel on application.
Where we cite research — the rosemary and saw palmetto trials referenced on our segment pages — it is research on those ingredients, not on Signal 5. We haven’t run a clinical trial on the finished product and we don’t imply we have.
We’re new. So here’s what you can hold us to.
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01
Every active on the label
All ten, named. It means competitors can read our formula. You being able to check it matters more.
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02
Ingredient research labelled as such
We cite studies on ingredients and say so plainly, including the parts that are less flattering.
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03
Eight to twelve weeks, said upfront
Before you pay, not after you complain. It costs us impulse orders and saves you a wasted month of hope.
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04
No dark patterns
No countdown clocks, no fake stock counters, no fabricated reviews. Cancel in two clicks, any time.
Signal 5
Five-Peptide Scalp Serum · 1 fl oz / 30ml · one bottle is one month. Results show at eight to twelve weeks, which is why the 90-day supply is the one most people choose.
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.
Common questions
Is there one product or several?
One. Signal 5 is a single formula — five biomimetic peptides plus five botanicals and amino acids. What changes between our three pages is which part of the explanation is relevant to you, not what arrives in the box. Most of this category sells you three differently-packaged versions of the same bottle; we’d rather tell you it’s one.
How long until I see something?
Eight to twelve weeks for most people, and the first sign is usually shedding less rather than growing more. Anyone promising four weeks is selling you a refund request.
How do I use it?
One dropper along your part and hairline, once a day, on a dry scalp. Massage for ten seconds. Don’t rinse. Sixty seconds total, and plenty of people do it at night.
Is it greasy? Colour-safe?
Lightweight serum, not an oil — it absorbs rather than sitting on the surface. And it goes on the scalp rather than the lengths, so it’s colour-safe.
Is it a drug? Does it contain hormones?
Neither. Signal 5 is a topical cosmetic serum: no minoxidil, no drug of any kind, no hormones, and nothing you swallow. It stays on your scalp.
Can I cancel a subscription easily?
Log in, two clicks, cancelled. You can also pause or push a delivery back a month. Or buy one-time and never hear from us about billing.
When should I see a doctor instead?
If your shedding is sudden and severe, comes out in distinct patches rather than diffusely, or persists beyond about six months. Thyroid issues and low ferritin both cause hair loss and both are worth ruling out — ask specifically for a thyroid panel and a ferritin level.
Where do you ship?
Across the contiguous US. Orders are prepared in 1–5 business days, then arrive in 2–4. Free shipping on orders over $100.