Lash and Brows

Multi-Peptide Lash and Brow Serums: Build Your Own for the Look of Fuller Lashes and Brows

A peptide lash and brow serum is a light, water-based formula that conditions lashes and brows and is used for the look of longer, fuller, denser-looking hairs. Skin Perfection sells the two parts so you can make it yourself: the Eyelash Peptide booster, a four-peptide complex, and the Lash and Brow Bulk Base it blends into. This guide explains what each one is, how much to use, and what to expect.

Which Product Do You Need

Eyelash Peptide for Lashes and Brows: the active booster

Choose the Eyelash Peptide for Lashes and Brows for the peptides. Its ingredient list is water, glycerin, biotinoyl tripeptide-1, myristoyl hexapeptide-16, myristoyl pentapeptide-17, myristoyl tetrapeptide-12 and panthenol. It is a formulation ingredient: blend it into a base rather than applying it undiluted. The product page rate is 10%, which is 90 drops per fluid ounce at the house rate of 9 drops = 1% per fl oz. It comes as the multi-peptide booster, as myristoyl hexapeptide-16 only, or as a lash and brow kit.

Lash and Brow Bulk Base: the carrier

Choose the Lash and Brow Bulk Base as the light serum you add peptides to. Its ingredient list includes glycerin, biotin, panthenol (vitamin B5), MSM, organic castor oil, botanical hyaluronic acid, palmitoyl tripeptide-5, amino acids and organic aloe leaf juice, preserved with phenoxyethanol and ethylhexylglycerin. It is paraben-free and vegan, per the product page.

Compare the Collection

How to Make and Use Your Serum

1. Wash your hands and use a clean, sanitized lash vial or bottle.
2. Add the Eyelash Peptide booster to the base at 10%: 22 drops per 0.25 oz, or 90 drops per 1 oz. Add peptides last and mix gently.
3. Lashes: brush a thin line along the upper lash line with a fine eyeliner brush, like liquid liner. Keep it out of the eye itself.
4. Brows: brush or dab directly onto the brows.
5. Apply morning and night, as the product page directs.

Storage: refrigerate the booster when it arrives, as the product page says. The peptide supplier's technical data sheet gives a 24-month shelf life at 2 to 8 C (12 months at room temperature) and says to keep the complex below 30 C.

Sensitive eyes: patch test the finished serum on the inner arm for 24 hours, start at a lower rate such as 5% (45 drops per oz), and stop if your eyes or lids feel irritated. For a full guide, read How to Use Lash Serum.

What the Evidence Shows

An article republished by City St George's, University of London, explains that peptides are a gentler alternative to prostaglandin analogue lash serums, but that most peptide studies involve scalp hair rather than eyelashes, so evidence specific to lashes is limited. Prostaglandin analogues such as bimatoprost are drugs, and the same article lists side effects including lid darkening and permanent iris darkening. Neither Skin Perfection ingredient list includes a prostaglandin analogue.

Frequently Asked Questions

Do peptide lash serums work?

Many people like how peptide serums make lashes and brows look conditioned and fuller, but published evidence for lashes specifically is limited, as most peptide research is on scalp hair. Consistent twice-daily use gives the best chance of seeing a difference.

How long does it take to see results from a lash serum?

Give it at least 3 to 4 months. Lashes grow slowly, and even studies of prescription lash products measure results at about 16 weeks of daily use.

What is the difference between peptide and prostaglandin lash serums?

Prostaglandin analogues, such as bimatoprost, are drugs that can cause lid darkening and permanent iris color change. Peptide serums use amino acid sequences and conditioners instead. Check labels for ingredients ending in "-prost".

Can I use lash serum on my eyebrows?

Yes. The same serum can be brushed onto the brows, and the Eyelash Peptide product page includes directions for both lashes and brows.

How much eyelash peptide should I add to a base?

Use 10%: 90 drops per fluid ounce of base, or 22 drops per 0.25 oz. If you combine myristoyl hexapeptide-16 and myristoyl pentapeptide-17 as separate ingredients, the product page says to use each at 5%.

Sources

• City St George's, University of London. Lash serums and prostaglandin analogues (republished from The Conversation), 2025.
• SpecPed, Lash1617 technical data sheet, 2023 (supplier data): composition, 1 to 10% recommended dosage, storage and shelf life.
• Ingredient lists, usage rates and prices: Skin Perfection product pages.

These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.

About the Author
Written by Kari Thomas, cosmetic formulator and founder of Skin Perfection.