Three weeks. Same woman, same shower.
Donna R., 65
Every woman sees her worst shedding at the wash. Nobody is treating the wash. KilgourMD is the only one I recommend.
Based on your answers, you have
—year old hair strands
Young strands
Your strands
Your strand age is common, and studied.
— Dr. James Kilgour, MD
Board-Certified Dermatologist
This score is an estimate based on your answers, not a medical diagnosis.
Strand age is a measure of the hair itself — how easily it breaks, how much scalp it covers, and how dry it feels. Yours is showing its age in all three.
Marker 1Breakage
Wash day shedding
Not all of what you find at the wash actually fell out. A lot of it snapped while it was still attached — because your hair has gone stiff, not weak.
Studies measuring the hair itself found thinner, older hair is more rigid and less flexible. It has lost the give that let it bend under a brush, so now it breaks instead.
Source: Baltenneck et al., Journal of Structural Biology, 2022
Marker 2Density
Scalp showing
Your hair did not just get thinner, it changed shape. Researchers comparing thick and thin hairs from the same heads found the thin ones had lost their oval shape and gone round.
And a rounder hair lies flatter and covers less scalp, even when you have the same number of hairs. At —, yours is covering around —% less than it did at thirty-five.
Source: Robbins et al., British Journal of Dermatology, 2012
Marker 3Dryness
Dry and dull
Older hair does not just hold less water — it takes water in more slowly than it used to. So a conditioner sitting on your head for two minutes in the shower barely gets anywhere before you rinse it off.
Which is why almost everything you have tried ended up coating the outside instead. Looks better wet, and by the time it dries you are back where you started.
Source: Baltenneck et al., Journal of Structural Biology, 2022
This score is an estimate based on your answers, not a medical diagnosis.
Built by a Stanford dermatologistYour match: six actives that
work on the hair you have now
BeforeAfter
Resveratrol
Anti-Shedding ActiveAn antioxidant that works on the scalp rather than the strand. A loosened follicle holds the hair until something moves it — your fingers rubbing shampoo in, the brush afterwards. Resveratrol tightens the grip, so less of it is sitting there waiting to go. In its studies, shedding dropped 61%.
Bio-Chelate 5 PF
Mineral ComplexA supplement cabinet, in a shampoo. Five minerals your hair is built from — zinc, iron, copper, silicon, magnesium — delivered straight onto the scalp. Swallow them and only 10 to 30% ever reaches your hair, because your heart, lungs and liver are served first. This skips the queue.
Kerashaft V
Strength Peptide
ResistHyal™
Hydration Active
Silkgel Neo™
Shine Protein
Sulfate-Free Cleansing
Gentle Surfactant Blend
Every active studied before
it ever went in the bottle
61% less shedding in 12 weeks
Before
AfterResveratrol, tested in a randomised, double-blind, placebo-controlled trial in 60 people over 12 weeks.
Shedding down 61%. Hair fall from combing down 68%. And the ratio of growing hairs to shedding hairs almost tripled.
See how shedding was measured
Every hair shed was counted daily and compared against each person’s own baseline, alongside a one-minute combing test and a pull test. Not a survey.
Source: Vichit & Saewan, Cosmetics, 2024.
Jennifer Hanway
Holistic Nutritionist · L’Oréal & J&J Advisor
“Every woman sees her worst shedding at the wash. Nobody is treating the wash. KilgourMD is the only one I recommend.”
17% thicker strands after washing
Untreated
TreatedKerashaft V, measured on human hair after washing — strand diameter up 17%, and 64% harder to break.
It rebuilds keratin inside the fibre rather than coating the outside, so each strand is genuinely wider rather than temporarily thicker. And it survives the rinse.
See how thickness was measured
Strand diameter measured under polarised light microscopy, and breaking force measured on a digital dynamometer, both against a benchmark plant-protein treatment. The same test found 325% more sulfur delivered into the hair — sulfur being what builds the bonds that hold a strand together.
Source: Kalichem technical study, Kerashaft V
Individual results vary. Not all users will experience these results.
20,000 women using daily
Real results from women
who fixed the wash step
Diane M.
Shedding down in 3 weeks
I’d got down to washing it once a week and dreading Sunday. I’m doing every other day now with the KilgourMD and less comes out than when I was stretching it out.
Beth S.
New baby hairs!!
Started in April. Look at all those baby hairs I can see when my hairdresser blew out my hair.
Chrystal T.
Finally stopped breaking
The short broken bits round my part were what bothered me most — I’d find them on my shoulders all day and I thought that was more of it falling out. It wasn’t, it was snapping. They’ve just stopped appearing. And it doesn’t feel like straw anymore either.
What to expect, wash by wash
First wash
Less in your hands.
Week 2
The scalp settles.
Week 4
Breakage drops.
Week 8
Thickness.
Week 12
All three, at once.
29% off + free shipping on all subscriptions
Our first batch sold out in two weeks, and the key actives take two months to make. We’ve restocked, but most of it is already reserved for subscribers.