Ingredients

Every ingredient, printed in full.

9 clinically studied actives in 36 ingredients. The same list is printed on every kit.

9 clinically studied actives

Energize & hydrate

Adenosine

INCI: Adenosine

Studied for energizing the scalp and for hair that looks thicker.

Study: Watanabe et al., Int J Cosmet Sci, 2015

Energize & hydrate

Caffeine

INCI: Caffeine

Studied for energizing the scalp. One of the most researched actives in hair care.

Study: Fischer et al., Int J Dermatol, 2007

Protect

Saw palmetto

INCI: Serenoa Serrulata Fruit Extract

Botanical studied for its role in a scalp environment affected by DHT.

Study: Evron et al., Skin Appendage Disord, 2020

Protect

Red clover

INCI: Trifolium Pratense (Clover) Flower Extract

Flower extract studied in scalp-care formulas for a balanced scalp environment.

Study: Loing et al., J Cosmet Sci, 2013

Strengthen

Acetyl tetrapeptide-3

INCI: Acetyl Tetrapeptide-3

Peptide studied for helping hair stay anchored and look fuller.

Study: Loing et al., J Cosmet Sci, 2013

Strengthen

Biotinoyl tripeptide-1

INCI: Biotinoyl Tripeptide-1

Biotin-linked peptide studied for helping hair stay anchored.

Study: Voiculescu & Lupu, Cosmetics, 2025

Energize & hydrate

Panax ginseng

INCI: Panax Ginseng Root Extract

Root extract studied for energizing the scalp.

Study: Park et al., J Dermatol Sci, 2015

Protect

Apigenin

INCI: Apigenin

Plant flavonoid studied for its role in scalp-environment care.

Study: Garre et al., J Cosmo Trichol, 2018

Protect

Oleanolic acid

INCI: Oleanolic Acid

Plant compound studied for its role in a scalp environment affected by DHT.

Study: Garre et al., J Cosmo Trichol, 2018

Full ingredient list (INCI)

Aqua, Propanediol, Butylene Glycol, Glycerin, Panthenol, Propylene Glycol, Diaminopyrimidine Oxide, Hydroxyacetophenone, 1,2-Hexanediol, Adenosine, Hydroxypropyl Cyclodextrin, Caffeine, Serenoa Serrulata Fruit Extract, Cyclodextrin, Ginkgo Biloba Extract, Alcohol, Biotin, Azelaic Acid, Panax Ginseng Root Extract, Hydrolyzed Sodium Hyaluronate, Peg-40 Hydrogenated Castor Oil, Lecithin, Pyrrolidinyl Diaminopyrimidine Oxide, Ppg-26-Buteth-26, Sodium Hyaluronate, Cholesterol, Larix Europaea Wood Extract, Glycine, Trifolium Pratense (Clover) Flower Extract, Dextran, Zinc Chloride, Camellia Sinensis Leaf Extract, Apigenin, Oleanolic Acid, Biotinoyl Tripeptide-1, Acetyl Tetrapeptide-3.

Why no percentages?

We do not disclose the percentage of each active. We publish the complete list in order, explain what each active does and link to the studies.

What "clinically studied" means

Each of the 9 actives has been studied in human trials. Those studies are of the ingredients. TREVO as a finished product has not been clinically tested.

Patch test first

Check the list for anything you react to, and patch test before your first session.