★★★★★
4.9· 1.214 reviews
The right answer for
Less than 1% of customers claim our 90-Day Money-Back Guarantee
"A scalp under constant tension behaves like inflamed skin, and it should be treated that way. Getting a barrier-repair active onto the scalp itself — rather than onto the hair covering it — is the part most routines get wrong."
This is the first thing I've seen that actually gets to the root of it instead of sitting on top. I love that it gives women a real answer they can use at home, without another appointment or another shelf full of products that don't work.
The short version
Real customers
Unretouched photos, same light, same angle, taken by customers on their own phones.
Individual results vary. Photos are unretouched and published with each customer's written consent.
In their own words
It isn't your fault
The oil problem
The textured-hair aisle runs on oils and butters. They coat the strand and sit on top of the scalp — the one place they can't do anything useful. Under a protective style they turn into build-up by week two.
The wrong target
Most are aimed at hormonal, male-pattern loss. If your thinning came from tension, relaxers and heat, DHT was never the mechanism — so blocking it was never going to be the fix.
The delivery problem
A dropper soaks into your hair before it ever reaches the scalp. And a fat rollerball built for straight hair just drags across the top of dense coils. Neither one gets to where the follicle is.
Dr. Reju-All was built from the other end: treat the scalp as skin, put the applicator inside the part, and make it light enough that you'll still be using it on week three of your braids.
90-day money-back promise
The mechanism
Everyone sells you the formula. The reason this one works is that it actually arrives — because a slim roll-on run down a parting is the only applicator that reaches scalp through type 4 density.
01 — Reach
The ball is narrow enough to sit inside a parting rather than ride across the hair around it. Braid parts, loc parts, the line under a wig cap — you already have the grid. Roll down it, and the formula lands on scalp instead of on strands.
02 — Calm
Polydeoxyribonucleotide is what Korean clinics reach for to settle skin that's been through something. A scalp under constant tension from braids, weaves and relaxers is skin that's been through something.
03 — Hold
PDO and a copper-peptide complex support the tissue the follicle sits in — the layer where density is decided long before you can see it in the mirror, and the layer tension damages first.
The ritual
Short enough that you'll still be doing it in week twelve. That is the entire design brief.
On loose hair, make four or five partings across the head. In braids, locs or a sew-in, use the ones already there — nothing needs taking down.
Press the ball to the scalp and run it the length of each parting, twice. You'll feel it cool as it lands — that's how you know it went on skin, not hair.
Thirty seconds with the pads of your fingers, not your nails. Then leave it — no rinsing, no wrapping differently. It's dry before your bonnet goes on.
Honest doses
No "proprietary complex" hiding a rounding error. Here is what's in it and how much, in the order it matters.
01
1,200 ppm
99% purity, low-molecular-weight fractions sized to actually penetrate. The level was chosen for absorption, not for the front of the box.
02
PDO
The other half of the name on the tube. A biocompatible polymer long used in medicine, here in a topical complex supporting the scalp's recovery environment.
03
Copper
A long-studied peptide for skin repair and firmness. Here it works on the scalp side of the problem rather than the strand.
04
Barrier
The recovery pair. Relaxers, colour and heat leave the barrier compromised long before the strand shows it — this is what rebuilds the ground.
05
The roll-on
The reason the other four matter. Everything above is inert if it never gets past your hair — and on type 4 density, most applicators don't.
Buy one, get one free · every bundle
What to actually expect
Hair grows on hair's schedule. Anyone selling you a two-week transformation is selling you something. Here's the real shape of it.
Week 1–2
Week 3–4
Week 6–8
Week 12
Take a photo of your crown on day one, in the same light. It is the only way to know for certain — memory is a terrible measuring instrument.
Where it sits
| Dr. Reju-All roll-on | Hair oils & butters | Growth drops & standard rollers | |
|---|---|---|---|
| What it treats | The scalp barrier — tension, processing, inflammation | The strand surface | Hormonal, male-pattern loss |
| Gets through dense coils | Slim ball rides inside the parting | Applied by hand, sits on hair | Wide balls drag and skim the top |
| Under a protective style | Absorbs in 30 seconds, no residue | Build-up and flaking by week two | Varies — most are alcohol-heavy |
| Dosing disclosed | Every active named with its level | Rarely | Sometimes |
| Safe on relaxed & colour-treated | Yes — fragrance-free, alcohol-free | Usually | Often irritating |
| Daily time cost | 30 seconds | 10–15 minutes, wash day | 1–2 minutes, twice daily |
Before you buy anything
Central Centrifugal Cicatricial Alopecia is one of the most common forms of scarring hair loss in women of African descent, and it begins quietly — a tender spot, a part that keeps widening, hair that doesn't come back.
Dr. Reju-All is a cosmetic scalp-care product. It is not a treatment, cure or preventative for CCCA, traction alopecia or any other medical condition, and does not replace medical care. If you notice tenderness, persistent itching, a widening part, or hair that isn't growing back — please see a dermatologist, ideally one experienced with textured hair.
Read the full guideIn their words
★★★★★
"My crown has been my sore spot for years — literally. This is the first thing that doesn't sting on a tender part. Ten weeks in and the section behind my parting finally looks less see-through."
★★★★★
"Knotless braids, six weeks at a time. Every other serum turned into gunk by week two. This one genuinely disappears — no smell, no slip, no flakes at takedown."
★★★★★
"The roller is the whole thing for me. I tried a fat one before that just dragged over my curls without touching skin. This one actually sits down in the part."
★★★★★
"Post-relaxer my scalp was permanently angry. Two months in and the itching has calmed right down. I'm still seeing my derm — but this is the part I can control at home."
★★★★★
"I've spent so much money on oils that did nothing except make my pillowcase greasy. This is the first thing that felt like it was for my scalp and not my hair."
No hoops
Photograph your crown on day one. Roll it on every night for ninety days. If the photo you take on day ninety doesn't look different to you, email us and we'll refund every cent — even if the bottle comes back empty.
No questionnaire, no restocking fee, no return shipping. You keep the photos either way, which is more than most of what you've tried has given you.
Start the 12-week cycleBefore you ask
That's exactly what the roll-on is for. Run the ball down the partings that are already there — you don't need to take anything down. Two passes per parting, then thirty seconds of fingertip massage. Every other night is enough while a style is in; nightly once it's out.
A wide one will — that's the honest problem with most roll-ons sold for hair, and it's why so many people give up on the format. This ball is narrow enough to sit down inside a parting rather than ride over the hair on either side of it. You're rolling along exposed scalp, not dragging across curls.
No. It's a water-gel with no oils, silicones or heavy emollients, and it absorbs in under thirty seconds. That's the specific reason it exists — most scalp products fail on week three of a protective style, not on day one.
Yes. It's fragrance-free, dye-free and alcohol-free, which is what matters on a chemically processed scalp. Wait 48 hours after a relaxer or colour service before starting, and patch-test behind the ear first if your scalp is reactive.
Roughly four weeks at one application a night across a full head. Less if you're only working on edges or one thin patch, more if a protective style means you're going every other night.
Scalp comfort usually shifts first, within a week or two. Shedding is the next thing people notice, around week three or four. Visible new growth takes longer — six to eight weeks at the earliest, because that's how fast hair grows.
Twelve weeks is the honest window for judging it. Take a crown photo on day one.
See a dermatologist first — genuinely. Both are conditions where early diagnosis changes the outcome, and no cosmetic product substitutes for that. Dr. Reju-All supports the scalp environment; it does not treat either condition.
Many people use it alongside whatever their dermatologist has prescribed. Ask them first.
The formula contains no minoxidil, no hormones and no retinoids. That said, we're not in a position to give you medical advice — check with your midwife or doctor, as you would with anything else.
Email us within ninety days and we refund it in full, empty bottle or not. No questionnaire and no return shipping. The 12-week cycle is the fair test, and the guarantee covers it with room to spare.
Dr. Reju-All PDO Advanced PDRN Hair Density Scalp Serum is a cosmetic product. It is intended to support the condition and appearance of the scalp and hair and is not intended to diagnose, treat, cure or prevent any disease or medical condition, including CCCA, traction alopecia or any other form of hair loss. Individual results vary. Customer quotes and the review score on this page are illustrative placeholders pending verified reviews. Ingredient levels must be substantiated against the finished formula's technical file before publication under EU Regulation 1223/2009 and the common criteria for cosmetic claims (Regulation 655/2013).
One decision left
Four bottles is one full cycle. Ninety days to find out, and a promise that covers you if you're wrong.
Shop the roll-on — from $26.25Buy one, get one free · free US shipping over $30 · 90-day money-back promise