Peptide Density Serum
New
A lightweight, fragrance-free scalp serum with five peptides, rosemary and saw palmetto extracts. Made for a simple daily scalp-care routine, including for people on a GLP-1 wellness journey who want to give their scalp extra attention. A few drops and a short massage, every day.
Buy 2, save 15%. The discount is applied at checkout.
Free US shipping
Arrives in 3–9 business days · 30-day returns on unopened bottles
Fragrance-free · Vegan · Cruelty-free · Made in the USA
Hairtide Peptide Density Serum is a lightweight scalp serum featuring a 5-Peptide Complex and botanical extracts including Rosemary, Saw Palmetto, and Arginine. 1 fl oz / 30 mL. Made in the USA.
Apply a few drops of serum directly to the scalp. Gently massage using your fingertips for 1–2 minutes to ensure even distribution. For external use only. Keep out of reach of children. Store in a cool, dry place.
Hairtide is a cosmetic scalp serum made to care for your scalp and the look and feel of your hair. It is not a drug and is not intended to treat or prevent hair loss. Results vary from person to person. The formula contains soybean and wheat germ extracts, so patch test before first use.
Water, Glycerin, Lecithin, Propanediol, Arginine, Caprylyl Glycol, Citric Acid, Eucalyptus Globulus Leaf Extract, Tocopherol, sh-Polypeptide-11, sh-Polypeptide-1, sh-Oligopeptide-2, sh-Oligopeptide-10, sh-Polypeptide-9, Lactic Acid, Glycine Soja (Soybean) Germ Extract, Triticum Vulgare (Wheat) Germ Extract, Scutellaria Baicalensis Root Extract, Sodium Benzoate, Gluconolactone, Calcium Gluconate, Potassium Sorbate, Rosmarinus Officinalis (Rosemary) Extract, Xanthan Gum, Sodium Gluconate, Serenoa Repens (Saw Palmetto) Extract
We ship within the United States, and shipping is free on every order. Each order is packed and shipped within 1–5 business days, then delivered by USPS in 2–4 business days. We email you as soon as it ships. See our Shipping Policy.
Unopened, unused bottles with the seal intact can be returned in their original packaging within 30 days of delivery. See our Return and Refund Policy.
For your GLP-1 journey
Your body is changing, and it may be hard for your hair to keep up. Hairtide Peptide Density Serum is a lightweight daily scalp serum with five peptides and botanical extracts, made for the look of fuller, thicker, denser hair. A few drops and a short massage, every day of your GLP-1 routine.
For sudden hair changes, talk to a healthcare professional.
The research
In a randomized trial of 100 men with pattern hair thinning, six months of rosemary oil produced a significant increase in hair count. The result was similar to the group using 2% minoxidil, with less scalp itching.
Panahi et al., Skinmed, 2015. View study
A 2020 review of five randomized trials and two cohort studies found positive effects from saw palmetto products, including a 27% improvement in total hair count. The authors note that larger trials are still needed. In a separate 16-week placebo-controlled study, a topical saw palmetto lotion increased hair density by 7.61%.
Evron et al., Skin Appendage Disorders, 2020. View review
Clinical, Cosmetic and Investigational Dermatology, 2023. View study
The maker of a botanical complex built on these three extracts reports that, in its own study of 61 volunteers using the complex at 3%, hair density increased by up to 59.3% and hair fall was reduced by up to 60.6%. This is manufacturer data, not an independent peer-reviewed trial.
Provital ingredient study data.
The five peptides here include bio-identical IGF-1, FGF and VEGF, growth factors studied for their role in the hair cycle. In a split-scalp study, a growth factor mixture applied with microneedling increased hair density by 27.4 hairs per cm² in three months, against 5.7 on the saline side. That study used a different blend with professional microneedling, so results may not carry over to a serum used on its own.
Korean Journal of Dermatology, 2017. View study
What to expect, and when
Your scalp should feel conditioned and comfortable. Visible change can appear in your hair this early, but is dependent on the person. Keep applying daily and stay consistent.
This is where consistency starts to matter. Hairtide supports a healthier scalp environment, giving your hair the best chance to look fuller, stronger, and better cared for over time.
This is the window where the studies recorded changes. A topical saw palmetto lotion increased hair density by 7.61% at 16 weeks, and the rosemary trial found a significant increase in hair count at six months.
Up close
Water is the first ingredient, so the serum goes on light. It is made without silicones, mineral oil or added fragrance.
Ingredient spotlight
sh-Polypeptide-1, -9 and -11 with sh-Oligopeptide-2 and -10, to support the appearance of thicker, fuller-looking hair.
An amino acid that helps improve the look of hair strength and vitality.
Botanical extracts that care for the scalp and leave it feeling refreshed.
Plant extracts that nourish the scalp and help hair look fuller.
What you get
A 1 fl oz / 30 mL bottle with a dropper, so you can apply the serum straight to your scalp a few drops at a time. Made in the USA.
Safety and quality
Parabens, sulfates, silicones, mineral oil, drying alcohols or added fragrance.
Every ingredient is listed in full on this page, so you know exactly what you are putting on your scalp.
Apply to the scalp only. Avoid contact with eyes; rinse well with water if it happens. Keep out of reach of children.
Contains soy and wheat germ extracts. If you are pregnant, nursing or have a scalp condition, check with your doctor before use. Stop use if irritation occurs.
I like that this serum doesn’t feel greasy or heavy. It fits easily into my night routine and doesn’t make my hair look oily the next morning
Tested the product for them, loved it!
So far I’m happy with it. It’s very easy to apply and doesn’t make my hair feel dirty.
I’ve been using Hairtide for around a month and I love how it doesn’t leave my hair greasy. I have seen some good results so far, and I’m excited to see how my scalp and hair keep developing!
Worked
Great product! Just takes some time to actually work
worked better than expected, didn't think it was going to work lol
