HAIR Serum

Fuller-looking hair starts at the scalp. HAIR Serum puts more than 2 trillion platelet-derived exosomes in every bottle and goes on the skin where hair grows, not on the lengths. One dropper, once a day, on the areas where you see the most scalp.

What it helps with

• The appearance of hair thickness, fullness and strength
• The look of hair density and scalp coverage
• A hydrated scalp, for the appearance of more volume and shine
• The look of shedding and breakage

Key ingredients

• Platelet-derived exosomes: nanosized vesicles that support the scalp's own renewal for thicker-, fuller-looking hair
• Curcuma longa (turmeric) root extract: antioxidant support for a healthier-looking scalp
• Biotin: helps support follicle structure for stronger-looking hair

How to use

Apply one pre-loaded dropper directly onto the scalp in the areas of concern. Wait 5 minutes before applying other products or heat styling. Hair grows slowly, so take photos in the same light at week 4 and week 12 to compare.

Size

30 mL / 1 fl oz

Awards

• Shape Skin Award, Best Hair Growth Serum (2026)
• Glamour Beauty & Wellness Award (2024)
• Robb Report Grooming Awards (2024)

Learn more

New to scalp serums? Read the exosome hair serum guide, then how to use a scalp serum step by step. What to expect: your first 12 weeks.

Formulated by Mayo Clinic physician-scientists, built on 20+ years of research. Cosmetic product. If you have sudden or patchy hair loss, pain, itching, scaling or a rash, see a dermatologist.

Full ingredients

water, pentylene glycol, propanediol, glycerin, human platelet extract, panthenol, trideceth-9, polyacrylate crosspolymer-6, PEG-5 isononanoate, biotin, carnosine, chondrus crispus extract, arginine, 1,2-hexanediol, caprylyl glycol, silanetriol, hydrolyzed gelatin, hyaluronic acid, curcuma longa (turmeric) root extract, phytic acid, lindera strychnifolia root extract, palmitoyl tetrapeptide-20 amide, saccharide isomerate, citric acid, sodium citrate