Scalp Theory
AHK-Cu Copper Peptide Scalp & Hair Tonic · 30 ml / 1 fl oz
Scalp Theory extends the copper peptide system to the scalp. AHK-Cu copper peptide works with caffeine and succinic acid in a lightweight, leave-in tonic, for a scalp that feels clean and balanced and hair that looks thicker and fuller over time.
Who it's for
Anyone who wants a clean, balanced-feeling scalp and hair that looks fuller over time. Suits all hair types, including color-treated and textured hair. Don't use it on broken or irritated skin.
Full ingredients
Aqua (Water), Glycerin, Copper Tripeptide-3, Caffeine, Succinic Acid, Panthenol, Sodium Hyaluronate, Leuconostoc/Radish Root Ferment Filtrate, Lactic Acid.
Listed exactly as printed on the label, in label order.
How to use it
Part the hair and apply 2–3 pumps directly to a clean, dry or towel-dried scalp, in sections. Massage in and don't rinse. Use once a day, morning or evening, and style as usual.
When to judge it
The scalp feels fresh from the first use. Hair grows slowly, so give it at least 12 weeks of daily use before you judge how your hair looks.
Shipping & 30-day guarantee
We make small batches every week, so your order ships within 2 days from Fulton, Missouri. Free US shipping.
If it doesn't suit your skin, tell us within 30 days of delivery for a refund or replacement. Opened bottles are fine. Refund policy
The ritual
Part the hair to expose the scalp in sections.
Apply directly to a clean, dry or towel-dried scalp. Do not rinse.
Massage in and style as usual. Use morning or evening, daily.
The science behind every bottle
Most tonics do one thing. Scalp Theory brings together three: a hair-focused copper peptide, a gentle balancing acid to keep the scalp feeling clean, and an invigorating refresh.
The hair-focused copper peptide (copper tripeptide-3) and the scalp-side cousin of the GHK-Cu in Copper Theory. Chosen here for the look and feel of a healthy scalp and fuller-looking hair.
A gentle organic acid that helps keep the scalp feeling clean and balanced, so the tonic sits comfortably at the scalp.
A familiar invigorating ingredient that leaves the scalp feeling fresh and awake — the finishing touch that rounds out the daily tonic.
Chosen with intention, down to the pump
Every bottle is an airless pump, which keeps air out of the formula and puts a measured amount right where you need it. We make small batches every week and batch-code each one. Copper peptides work gradually, so this is a long-term scalp-care routine and consistency matters more than speed.
Questions, answered
Will it leave residue? +
No. It's a lightweight tonic designed to absorb at the scalp without a greasy finish.
Does it suit color-treated or textured hair? +
Yes — it works at the scalp, so it suits all hair types and textures. Patch test if your scalp is sensitive.
How soon will I see a difference? +
Hair grows slowly, so give it at least 12 weeks of consistent daily use before you judge how your hair looks.
Pregnant or breastfeeding? +
We recommend checking with your doctor before introducing any new product.