A daily topical scalp serum. Six peptides, every one lab-tested.
30-day returns on your first order · free US shipping on subscriptions
Purity from each 2026 certificate of analysis.
99.96%
purity on its certificate of analysis
batch Z099260602Z · tested jun 17, 2026
GHK-Cu (Copper Tripeptide-1)
the growth signal
The body makes less GHK with age (Pickart & Margolina, 2018). This batch tests 99.96% pure, 76.0% active peptide, 14.0% copper. It signals the growth phase and, in lab research, supports dermal papilla cells and their blood supply.
99.1%
purity on its certificate of analysis
batch JT20260110 · tested jan 29, 2026
AHK-Cu (L-Alanyl-L-Histidyl-L-Lysine Copper)
the root strengthener
A second copper peptide, so this isn't a GHK-only formula. On human hair follicles in the lab, AHK-Cu helped dermal papilla cells multiply and follicles lengthen (Pyo et al., 2007).
99.6%
purity on its certificate of analysis
batch JT20260502 · tested may 15, 2026
GHK Basic (Tripeptide-1)
the scalp balancer
Copper-free GHK, fully water-soluble. It keeps the scalp around each follicle balanced.
98.5%
purity on its certificate of analysis
batch ZJ20260409 · tested apr 20, 2026
Pal-AHK (Palmitoyl Tripeptide-1)
the follicle protector
A peptide with a fatty-acid tail, a common way to help it stay stable and move into skin. It helps protect and repair the follicle.
98.9%
purity on its certificate of analysis
batch JT260327-04 · made mar 27, 2026
PTD-DBM (Protein Transduction Domain-Fused Dishevelled Binding Motif)
the follicle wake-up
New growth cycles run through the Wnt signal, and the protein CXXC5 holds it back. PTD-DBM is built to block CXXC5. In mice, it restarted hair growth (Lee et al., 2017).
99.0%
purity on its certificate of analysis
batch ZJ20260508 · tested may 24, 2026
Acetyl Tetrapeptide-3
the anchor
91.1% active. It supports the proteins around the follicle that keep hair anchored at the root.
All six peptides, bought separately.
All six, one bottle. About $1.60 a day.
On the 6-month plan.
With ingredients clinically studied to:
Scroll to follow a resting follicle into its growth phase, and where each of Bloom's six peptides comes in.
resting follicle
Every follicle cycles: grow, rest, shed, repeat. Stress, hormones, menopause and age can keep more of them resting for longer, and the hair they would grow never shows up. This one is resting.
serum arrives
pal-ahkthe follicle protector
Bloom is water-based, so it goes on the scalp, not the strand. Pal-AHK carries a fatty-acid tail, a common way to help a peptide stay stable and move into skin. Its job: help protect and repair the follicle.
wake-up signal
ptd-dbmthe follicle wake-up
Follicles start a new growth cycle through a signaling route called Wnt. A protein called CXXC5 holds that route back. PTD-DBM is built to block CXXC5 so the signal gets through. In mice, it restarted hair growth.
growth signal
ghk-cuthe growth signal
At the base of every follicle sit dermal papilla cells, which set how long it grows. GHK-Cu is a copper peptide the body makes less of with age. In lab research it supports those cells and the blood supply around them. It's also why the serum is blue.
growth phase
ahk-cuthe root strengthener
The second copper peptide. On human hair follicles in the lab, AHK-Cu helped dermal papilla cells multiply and follicles lengthen.
anchored
acetyl tetrapeptide-3the anchor
A new hair needs a firm hold. Acetyl Tetrapeptide-3 supports the proteins around the follicle that keep hair anchored in place.
healthy scalp
ghk basicthe scalp balancer
A copper-free form of GHK, there to keep the scalp around every follicle balanced.
six peptides, $300+ bought separately. one drop a day.
shop bloom| What matters | bloom | ghk-cu only | hair oils | minoxidil |
|---|---|---|---|---|
| GHK-Cu | yes | yes | varies | no |
| a second copper peptide, AHK-Cu | yes | no | varies | no |
| four more peptides | yes | no | varies | no |
| drug-free | yes | varies | yes | no |
| water-based, no oil | yes | varies | no | varies |
Unedited reviews from women using Bloom, including the mixed ones.
I was previously using an injectable ghk-cu but it would irritate my skin. It wasn't something I wanted to continue long term. I kept seeing ads for fleur so I decided to try it. I'm so glad I did. I don't shed anymore my hair looks and feels thicker and I'm getting baby hairs all over. Just started my second month!
Valverified buyer
I’ve been using this product for 3 mo now and really haven’t seen any changes in my hair! One thing I’ve noticed as I’ve purchased a few times, the product is different between bottles. I’ve received clear serums and then some are blue. Not consistent, just curious why they differ! They should all be clear or all be blue! Makes me unsure of the product.
Lori Jamiesonverified buyer
fleur replied
Our first version of Bloom (1.0) had lower levels of GHK-Cu and AHK-Cu, the two peptides that make the serum blue, so it only looked blue in volume. Bloom 2.0 carries much more of both, so it reads deep blue in the dropper. 1.0 is fully phased out; every bottle now ships as 2.0.
I am really happy with the product and appreciate the quality clean ingredients, that it is unscented, and that it doesn’t leave any residue on my scalp after application. I am beyond impressed with the incredible customer service I received after a minor logistics issue, which was promptly resolved and in the friendliest possible way. I felt the accountability and care this company took of me and that alone would have made me a loyal customer- you guys are doing a great job!
K.M.verified buyer
Found my forever serum in this product. By far the best stuff out there. Not sticky, oily or fragrance. I use 2x a day. A little here n there goes a long way. Thank you for the quality and makin it affordable
Carla Dumontverified buyer
I was able to grow my eyebrows back in about three months and my hair line has also made a spectacular comeback! I highly recommend and will continue ordering this fantastic potion.
Diane Mverified buyer
I am on my second bottle (bought the three pack bundle). I am starting to see difference in, believe it or not, my grays and baby hairs growing in.
Michele Violanteverified buyer
easy to apply and doesnt make hair greasy. too soon for results.
lisa palmerverified buyer
GHK-Cu, AHK-Cu, GHK Basic, Pal-AHK, Acetyl Tetrapeptide-3 and PTD-DBM, in a base of water, butylene glycol, propanediol, glycerin, pentylene glycol, hydroxyethylcellulose, phenoxyethanol and ethylhexylglycerin.
The blue comes from the copper peptides, GHK-Cu and AHK-Cu. Bloom 2.0 carries more of both, so the dropper reads deep blue. The bottle itself is amber glass.
Somewhere cool, out of direct sun. Shake before use.
Once a day, morning or night. Shake, part your hair, apply along the parts and thinner areas, then massage in with your fingertips. About two minutes. Don't rinse.
Patch test first if your scalp is sensitive.
Your first order comes with 30-day returns. Subscriptions ship free and you can pause or cancel anytime from your account.
