You've tried the rosemary oils and your part still looks wider than it used to.
Advanced Hair Density Serum
Five hair peptides work at the scalp to support the look of fuller, denser hair — a targeted step beyond a basic oil.
Hair Care · Five-Peptide Scalp Serum
Fuller-looking hair, built at the scalp.
For thinning that's past 'just use rosemary oil.' Five hair peptides go to work at the scalp to support the look of fuller, denser hair and stronger-feeling strands — the next level when oils alone aren't cutting it anymore.
- The look of fuller, denser hair and less visible shedding over consistent use
- Five hair peptides target the scalp — the next step up from oils alone
- Stronger-feeling strands at the hairline and temples, where thinning shows first
- A lightweight leave-in serum that won't leave hair greasy or weighed down
🥬Vegetarian🌱Vegan-Friendly⚖️Hormone-Free🐰Cruelty-Free🤍Fragrance-Free🧪Paraben-Free⚗️Phthalate-Free🫧Sulfate-Free💠Silicone-Free🛢️Mineral Oil-Free🇺🇸Made in USA🥬Vegetarian🌱Vegan-Friendly⚖️Hormone-Free🐰Cruelty-Free🤍Fragrance-Free🧪Paraben-Free⚗️Phthalate-Free🫧Sulfate-Free💠Silicone-Free🛢️Mineral Oil-Free🇺🇸Made in USA🥬Vegetarian🌱Vegan-Friendly⚖️Hormone-Free🐰Cruelty-Free🤍Fragrance-Free🧪Paraben-Free⚗️Phthalate-Free🫧Sulfate-Free💠Silicone-Free🛢️Mineral Oil-Free🇺🇸Made in USA
Why it works
When oils aren't enough, peptides are the next level.
Shedding at the hairline and temples is the part that shows first and worries you most.
Advanced Hair Density Serum
Massaged in daily, the serum supports stronger-feeling strands and the look of density right where thinning is most visible.
Hair treatments usually leave your hair greasy or flat.
Advanced Hair Density Serum
This is a lightweight leave-in — it absorbs into the scalp without weighing your hair down or making it look oily.
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5 Peptides
Multiple hair peptides target the scalp.
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Fuller Look
Supports the look of denser, fuller hair.
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Stronger Feel
Strands that feel stronger at the temples.
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Lightweight
Leave-in that won't weigh hair down.
The ritual
Your daily scalp routine
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1
Part
Section dry or towel-dried hair to expose the scalp.
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2
Apply
Drop the serum along the part and thinning areas, then massage it into the scalp.
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3
Leave in
Don't rinse — use it daily and give it a full 90 days.
Full transparency
What's inside — and what's not
Five hair peptides (sh-Polypeptide-11, sh-Polypeptide-1, sh-Oligopeptide-2, sh-Oligopeptide-10, sh-Polypeptide-9) with arginine and eucalyptus in a lightweight water base. A leave-in scalp serum.
Never✕ Fragrance✕ mineral oil✕ silicones✕ parabens✕ sulfates
100-Day Money-Back Guarantee
Use it daily for a full cycle. If your hair doesn't look fuller and feel stronger, reach out for a full refund — bottle included.
Applies after 21 days of consistent use, once per product, and covers the product price — not shipping. See our Refund Policy for details.
Pay Over Time
Split it into 4 interest-free payments with Afterpay, or use Shop Pay Installments — chosen at checkout.
Made Fresh, Shipped Tracked
Freshly made for you in 1–5 business days, then shipped tracked from the USA — typically at your door in 5–9 business days.
The Honest Comparison
Why a peptide serum beats a basic oil
Oils condition the scalp. A five-peptide serum targets the look of density where thinning shows most.
| What matters | ✦ Austin Bloome Advanced Hair Density Serum | Basic scalp oil |
|---|---|---|
| Five hair peptidesTargeted actives, not just conditioning oil | ✓ | ✕ |
| Look of fuller hairSupports the appearance of density at the part and temples | ✓ | Sometimes |
| Lightweight leave-inAbsorbs into the scalp without a greasy, weighed-down feel | ✓ | ✕ |
| Fragrance-freeNothing added to irritate a sensitive scalp | ✓ | Sometimes |
| Vegan & cruelty-freePlant-friendly, never tested on animals | ✓ | Sometimes |
| Made fresh in the USAMade to order and shipped tracked, not mass-produced overseas | ✓ | Sometimes |
5 peptidesLightweight leave-inMade in the USA
One bottle, used daily, lasts around two months.
Water, glycerin, lecithin, propanediol, arginine, caprylyl glycol, citric acid, eucalyptus leaf extract, tocopherol, sh-Polypeptide-11, sh-Polypeptide-1, sh-Oligopeptide-2, sh-Oligopeptide-10, sh-Polypeptide-9, lactic acid, soybean germ extract, wheat germ extract, Scutellaria baicalensis root extract, sodium benzoate.
- Five hair peptides (sh-Polypeptide-11, -1, -9; sh-Oligopeptide-2, -10)Five different short chains of amino acids — the same building blocks hair itself is made from — each chosen for a different job at the scalp.They're the reason this is the step up from an oil: together they support the look of fuller, denser hair and stronger-feeling strands where thinning shows first.
- ArginineAn amino acid your body already uses, applied here straight to the scalp.It conditions the scalp environment so the peptides land somewhere healthy rather than dry and tight.
- Scutellaria baicalensis (baikal skullcap) root extractA traditional East Asian botanical, long used to calm skin.Keeps the scalp comfortable enough to use a serum every single day — which is the only way this works.
- Soybean & wheat germ extractsNutrient-rich plant extracts from the germ, the living part of the seed.They condition the scalp and hair root area, supporting the look of healthier, denser-appearing hair.
- Tocopherol (vitamin E) & eucalyptus leaf extractA natural antioxidant plus a fresh, clarifying botanical.Vitamin E helps keep the serum fresh in the bottle; eucalyptus leaves the scalp feeling clean rather than coated.
- Water, glycerin & lecithin baseA lightweight water-and-glycerin base with lecithin, a natural carrier.It's why the serum absorbs instead of sitting greasy — no oil slick, no weighed-down roots.
Questions, answered
What does this actually do?
Five hair peptides work at the scalp to support the look of fuller, denser hair and stronger-feeling strands, especially at the part and temples where thinning shows first. It's a cosmetic scalp serum working on appearance — it isn't a drug and doesn't treat any medical cause of hair loss.
What is a peptide hair serum, in plain words?
Peptides are short chains of amino acids — the same building blocks hair itself is made from, and one of the most-studied ingredient families in modern cosmetic science. Ours uses five of them in a lightweight leave-in that goes on the scalp, not the lengths, to support the look of fuller, denser hair. Researchers are still exploring what different peptides do at the scalp; what we'll promise is the formula, the five of them, and 90 days of easy daily use.
Why five peptides instead of one?
Because they're not interchangeable — each sh-peptide brings something different to the scalp, and peptides are one of the most-studied ingredient families in modern cosmetic science for exactly that reason. Five is why this is the step up from a single-ingredient oil.
What can a peptide scalp serum realistically do for thinning?
Peptides work at the scalp on the look of density, and with daily use over months many people see a fuller-looking part and less visible shedding — which is exactly where thinning shows first. This serum puts five of them in a lightweight daily leave-in, fragrance-free and safe on colour. It's a cosmetic scalp serum, and 90 days of consistency is the honest ask — give it that and it's the strongest step available before a doctor's door.
Is this a hair-loss treatment?
No — it's a cosmetic scalp serum that supports the look of fuller, denser hair and stronger-feeling strands. That's what it's built to do, and it does it without a prescription or a side-effect conversation. It isn't a drug and doesn't treat any medical cause of hair loss; for that, see a doctor.
How is this different from the botanical serum and the scalp oil — and can I use them together?
This is the targeted, higher-strength step for thinning past the oil stage. Austin Bloome Botanical Hair Growth Serum is the gentler daily herbal option, and Austin Bloome Hair Oil for Scalp Health & Hair Growth is a nourishing weekly massage. Many people layer them as their thinning warrants — apply this lightweight serum first and let it absorb before any oil.
How much do I use, and how often?
Enough to lightly cover your part and thinning zones once a day — usually a small dropper's worth — then massage it in for a minute. It's a leave-in, so don't rinse it out. Twice daily is fine if the label allows, but more won't speed the hair cycle up. One minute a day is the entire commitment.
Wet or dry hair — and scalp or lengths?
Dry or towel-dried scalp, always along your part and thinning zones — never through the lengths. The peptides are working where hair starts, so putting it down the lengths just uses up the bottle. Massage it in with your fingertips for a minute; that's the whole routine.
How long until I see a difference?
Give it a full 90 days of daily use. Hair works on a slow cycle — that's the honest ask, and it's why we say it plainly instead of selling you a fortnight. The look of fullness at the part and less visible shedding build gradually, so the people who see the most are simply the ones who kept going.
Will it make my hair greasy, or change my wash days?
No on both counts. It's a lightweight, water-based leave-in that absorbs into the scalp rather than coating the hair, so it won't weigh your style down and your wash routine can stay exactly as it is.
Is it right for colour-treated hair or a sensitive scalp?
Yes on both. It goes on the scalp rather than the lengths, so it won't strip or affect colour, and it's fragrance-free and water-based — most people use it daily with no fuss at all, which is exactly what a 90-day routine needs. If your scalp is sensitive, try it every other day for the first week. Stop and speak to a professional if you get persistent redness or itching.
How long does one bottle last, and how should I store it?
Around two months with daily use — and since this one asks for 90 days, the multi-bottle bundle is the version that actually covers the full cycle the results need. Keep the cap on and store it somewhere cool and dark; heat and light are hardest on peptides.
Where is it made, and what is actually in it?
It's made in the USA in small batches, freshly made for your order in 1–5 business days and shipped tracked — not a mystery bottle sent from an overseas warehouse. Inside: five sh-peptides in a lightweight, fragrance-free, water-based leave-in.
Is it any use for the shedding after having a baby?
Cosmetically, yes — it can support the look of fullness at the part and temples while you wait it out. The shedding many women notice a few months postpartum is a normal phase and usually settles on its own; no serum changes that cycle. If you're pregnant or nursing, check with your provider before starting anything new, and our Postpartum collection is built for exactly where you are.
What if I get to 90 days and nothing's changed?
Then it costs you nothing. You're covered by our 100-Day Money-Back Guarantee — deliberately longer than the 90 days we ask for. Use it daily, and if your part doesn't look fuller, reach out for a full refund, even on an opened bottle. See our Refund Policy for details.