The Beauty & Personal Care Brand Builder Series

The Beauty & Personal Care Brand Builder Series

GrowPotion Fluffy Brow + Lash Boosting Serum | Manufacturing and Formulation Insights

This page provides an ingredient-level review of GrowPotion Fluffy Brow + Lash Boosting Serum by Kosas. Below you’ll find the publicly available ingredient list, a dynamic ingredient breakdown linked to the FormuNova ingredient database, and a formula structure overview intended for cosmetic founders, product developers, and brand teams researching competitor product architecture in modern lash & brow serums and related Beauty & Personal Care categories. This page is a formulation and manufacturing review and does not imply or state any association between FormuNova and Kosas.

Full Ingredient List

Water (Aqua), Pullulan, Propanediol, Glycerin, Butylene Glycol, Sorbitol, Pentylene Glycol, Xanthan Gum, Sodium Hyaluronate, Panthenol, Soy Amino Acids, Wheat Amino Acids, Arginine HCl, Serine, Threonine, Trehalose, Acetyl Tetrapeptide-3, Biotinoyl Tripeptide-1, Myristoyl Pentapeptide-17, Trifolium Pratense (Clover) Flower Extract, Citric Acid, Dextran, Sodium Gluconate, Acacia Senegal Gum, Phenethyl Alcohol, Potassium Sorbate, Ethylhexylglycerin, Benzyl Alcohol, Benzoic Acid

Formulation Deep Dive

Kosas GrowPotion Fluffy Brow + Lash Boosting Serum is a water-based follicle-stimulating serum engineered to support hair density and health. The formulation utilizes a high-clarity aqueous base structured with a complex humectant system of propanediol, glycerin, butylene glycol, and sorbitol to facilitate active delivery while maintaining a lightweight, non-tacky finish. The active performance strategy centers on a synergistic peptide complex comprising Acetyl Tetrapeptide-3, Biotinoyl Tripeptide-1, and Myristoyl Pentapeptide-17, which work alongside Trifolium Pratense (Clover) Flower Extract to target the hair growth cycle and improve structural integrity. Additionally, Sodium Hyaluronate and Panthenol (Pro-Vitamin B5) provide essential hydration and conditioning, while a blend of Soy and Wheat Amino Acids mimics keratin to reinforce the hair shaft. The system is stabilized using a dual-polymer network of xanthan gum and acacia senegal gum and is protected by a broad-spectrum preservative blend including potassium sorbate, ethylhexylglycerin, and benzyl alcohol to ensure formula stability and safety for the delicate eye area.

Formula Structure Overview

This formula has a 93% match with ingredients from our research database. Among the matched ingredients, the main functional themes identified are categorized as hydrator, barrier support, conditioner, and strengthener ingredients.

Reviewed Ingredient Coverage
93%
Matched Ingredients
27

Ingredient Analysis

About our ratings
Water GREAT
Purified water serves as the primary, high-quality solvent in most cosmetics.
Solvent
Pullulan GREAT
Formulate with Pullulan to create a smooth, pliable film that tightens and hydrates the skin, improves texture, and enhances delivery of actives, while also imparting shine and smoothness to hair.
Hydrator Emollient Texture Enhancer Barrier Support Anti-Aging Agent
Propanediol GREAT
Improve hydration, solubilize actives, enhance texture and absorption, support barrier function.
Hydrator Emollient Barrier Support Solvent
Glycerin GREAT
To attract and retain moisture in the skin and hair, enhancing hydration and improving barrier function.
Hydrator Moisturizer Emollient Texture Enhancer Conditioner Soother Barrier Support Anti-Aging Agent Solvent
Butylene Glycol GOOD
To hydrate and condition skin and hair, enhance the absorption of active ingredients, and improve product texture and stability.
Hydrator Moisturizer Emollient Texture Enhancer Conditioner Solvent Preservative
Sorbitol GOOD
To attract and retain moisture in skin and hair while supporting texture stability and hydration balance.
Hydrator Moisturizer Texture Enhancer Conditioner
Pentylene Glycol GREAT
To elevate cosmetic formulations by delivering efficient hydration, actives solubilization, enhanced texture, and supplemental antimicrobial support—thereby improving both performance and sensory quality.
Hydrator Moisturizer Texture Enhancer Conditioner Soother Barrier Support Solvent Preservative
Xanthan Gum GOOD
Improves formula viscosity and stability, enhances spreadability, supports skin hydration by forming a moisture-retaining film, and smooths hair appearance.
Hydrator Moisturizer Texture Enhancer Conditioner Soother Barrier Support Emulsifier
Sodium Hyaluronate GREAT
To attract and retain moisture within skin and hair-care formulations, improve product texture and spread, fortify barrier integrity and deliver a smoothing, plumping effect.
Hydrator Moisturizer Texture Enhancer Conditioner Soother Barrier Support Anti-Aging Agent
Panthenol GREAT
To hydrate and condition skin and hair, enhance barrier function, and provide anti-inflammatory benefits.
Hydrator Moisturizer Emollient Conditioner Strengthener Soother Anti-Inflammatory Agent Barrier Support Emulsifier
Soy Amino Acids GOOD
Moisturize and fortify skin or hair; enhance repair and elasticity.
Moisturizer Conditioner Strengthener Barrier Support Anti-Aging Agent
Wheat Amino Acids GOOD
Replenish NMF-like amino acids to enhance water binding, comfort, and combability in skin and hair formulas.
Hydrator Conditioner Anti-Frizz Agent Soother Barrier Support
Arginine HCl GOOD
Deliver an NMF-aligned, cationic amino acid to enhance hydration, conditioning, and hair fiber manageability in acid-compatible formulations.
Hydrator Conditioner Strengthener Barrier Support Oil Control Agent
Serine GOOD
Provide NMF-aligned, water-binding and conditioning benefits to enhance skin comfort and hair manageability without heaviness.
Hydrator Conditioner Anti-Frizz Agent Strengthener Microbiome Balance Agent Barrier Support
Threonine GOOD
Deliver a skin-identical amino acid to boost water binding, comfort, and hair manageability in modern, low-irritancy systems.
Hydrator Conditioner Anti-Frizz Agent Strengthener Barrier Support
Trehalose GREAT
To deliver deep, sustained hydration and barrier fortification while providing antioxidant protection and formulation stability — ensuring skin and hair remain supple, resilient, and balanced.
Hydrator Moisturizer Texture Enhancer Antioxidant Soother Microbiome Balance Agent Barrier Support
Acetyl Tetrapeptide-3 GOOD
A biomimetic peptide (the Capixyl active) that supports the appearance of denser, healthier-looking hair by stimulating extracellular-matrix anchoring proteins around the follicle; also used for a firmer-looking skin appearance.
Strengthener Anti-Aging Agent
Biotinoyl Tripeptide-1 GOOD
A biotin-conjugated tripeptide used to support the appearance of stronger, fuller, healthier hair.
Strengthener Conditioner
Myristoyl pentapeptide-17 GREAT
Stimulates keratin gene expression to promote hair follicle proliferation and fortification, while enhancing skin barrier integrity and reducing inflammation.
Strengthener Soother Anti-Inflammatory Agent Microbiome Balance Agent Barrier Support Anti-Aging Agent
Trifolium Pratense (Red Clover) Flower Extract GREAT
Enhance skin resilience, hydration, and radiance; soothe inflammation; stabilize tone; and support scalp health and hair density.
Hydrator Conditioner Antioxidant Soother Anti-Inflammatory Agent Barrier Support Anti-Aging Agent
Citric Acid GOOD
Acts mainly as a pH adjuster and buffer and as a chelating agent that protects formula stability and preservation; at higher leave-on levels it also serves as a mild exfoliating AHA.
Chelating Agent Exfoliant
Dextran GOOD
A naturally derived polysaccharide used as a skin-conditioning humectant, texture / viscosity modifier and gentle carrier.
Hydrator Texture Enhancer
Sodium Gluconate GOOD
Bind metal ions to prevent oxidation/discoloration and boost formulation stability while providing secondary skin-conditioning benefits.
Texture Enhancer Conditioner Strengthener Barrier Support Chelating Agent
Acacia Senegal Gum NOT RATED
Phenethyl Alcohol NOT RATED
Potassium Sorbate GOOD
Functions as a preservative (antimicrobial), protecting water-containing formulations primarily against yeasts and molds, with weaker activity against bacteria. Its activity is pH-dependent and strongest in acidic systems (effective below roughly pH 6, optimal near pH 4.4), so it is used in low-pH products and is commonly paired with a second preservative such as sodium benzoate for broad-spectrum coverage.
Preservative
Ethylhexylglycerin GOOD
A multifunctional additive that boosts preservative efficacy, provides deodorant activity, and conditions skin with a light, non-greasy feel.
Preservative Microbiome Balance Agent
Benzyl Alcohol GOOD
A naturally-occurring aromatic-alcohol preservative and solvent for broad-spectrum protection.
Preservative Solvent
Sodium Benzoate GOOD
Functions as a preservative (antimicrobial), protecting water-containing formulations from yeast, mold, and bacterial spoilage. Its activity is pH-dependent and strongest in acidic systems (optimal below roughly pH 5), so it is used in low-pH products and frequently paired with potassium sorbate for broader, more robust preservation.
Preservative
The information provided in this review is based on internal research and publicly available sources. It is intended for general informational purposes only and does not constitute medical, legal, or regulatory advice. We do not guarantee the accuracy or completeness of this information. Users are encouraged to conduct their own research and consult appropriate professionals before making decisions based on this information.

The manufacturing partners for Kosas are not publicly disclosed. Many brands work with multiple contract manufacturers across different regions depending on production volume, product type, and regulatory requirements.

Exact sales numbers for Kosas are not publicly disclosed.

Kosas has successfully captured market share by focusing on a successful balance of marketing and formulation.

Replicating that success requires more than just copying a formula, it requires identifying a marketing strategy that is unique to your brand’s audience, associated with a great product offering.

At FormuNova, we specialize in helping brands move past imitation to create high-performance product offerings with potential to outperform the current market leaders. Let’s discuss your launch strategy.

Planning your next product launch?

Product Development, Private Label and Custom Formulation

Skin care concept, cosmetic products round drops texture samples such as moisturizer, serum and oil

Researching successful Lash & Brow Serums for your next product launch?

This page provides an independent ingredient analysis of publicly available cosmetic products for research purposes. All trademarks, brand names, and product names are the property of their respective owners. FormuNova does not claim to be affiliated with, endorsed by, or sponsored by the brands mentioned on this page. Product images, when shown, are used solely for identification and commentary under fair use principles.

Minimal skincare foam cream and serum drop texture

FormuNova is a full-service Beauty & Personal Care formulation and contract manufacturing partner.

Let’s talk about your next product launch.

Made in USA
Made in USA
Macro close-up of clear cosmetic serum or essence with visible air bubbles. Ideal for beauty branding, cosmetic ads, skincare ingredient design, or clean and minimal product presentations.