Eyebrow and eyelash serums typically condition hairs with peptides, vitamins, and oils to support their appearance. Whether you want to address sparse brows, brittle lashes, or simply maintain a fuller look, these products offer targeted care for the eye area.
How we choose
Formulas vary from peptide-based serums to pure castor oil, and applicators range from fine-tip brushes to mascara-style wands. Some are designed for both brows and lashes, while others are dedicated to one area. Price, ingredients, and desired convenience all play a role in choosing the right one.
Our 8 Picks
Grande Cosmetics GrandeBROW Brow Enhancing Serum For Fuller, Bolder, Looking Eyebrows - Brow Serum With Vitamins, Peptides, Antioxidants, Amino Acids, Cruelty-Free
What it is
A brow conditioning serum formulated with peptides, vitamins, antioxidants, and amino acids.
Why it's worth it
Best for readers who want a targeted brow serum with a precise applicator. The brand states that consistent use supports the appearance of fuller-looking brows over time. The formula is cruelty-free and designed for sparse, thinning, or over-plucked areas.
Caveat
Results require consistent application over several weeks; sensitive users should review the ingredient list before use.
Grande Cosmetics GrandeLASH-MD Lash Enhancing Serum - Peptide & Vitamin Infused Formula for Longer, Thicker, Fuller Looking Lashes - Ophthalmologist Tested, Cruelty-Free
What it is
A lash conditioning serum infused with peptides and vitamins.
Why it's worth it
Best for readers who want a dedicated lash serum with a slim brush applicator that feels like liquid liner. The brand states the formula conditions lashes to appear fuller and more voluminous over time. It is ophthalmologist tested and cruelty-free.
Caveat
Brand recommends applying only along the upper lash line and keeping the product out of the eyes to avoid irritation.
e.l.f. Enhancing Lash & Brow Serum, Promotes Longer-Looking Lashes & Brows, Nourishing & Conditioning Formula, Clear, 0.12 Fl Oz (3.5mL)
What it is
A clear conditioning serum for both lashes and brows, with antioxidants, amino acids, vitamins, and castor seed oil.
Why it's worth it
Best for readers who want a single, affordable product for both brows and lashes. The brand states the formula nourishes delicate hairs so they appear healthier and more defined. It suits minimalists or those new to lash and brow care.
Caveat
As a conditioning serum, it offers subtle cosmetic improvement rather than dramatic overnight changes.
The Ordinary Multi-Peptide Lash and Brow Serum, Peptide-Powered Formula for Thicker, Fuller Looking Lashes & Brows, 0.16 Fl Oz
What it is
A lightweight serum with multiple peptides.
Why it's worth it
Best for ingredient-conscious readers who prefer a science-forward, peptide-based formula at an accessible price. The brand recommends twice-daily use to help strengthen and condition brows and lashes without heaviness.
Caveat
Brand recommends twice-daily application for best results; do not apply to broken or irritated skin.
ETUDE My Lash Serum, Eyelash Strengthening Formula with Biotin, Ginger extract for Lash health and growth, Mascara Essence, Mascara Serum, Vegan Certified, Korean Makeup (0.3 Fl Oz)
What it is
A Korean lash serum with biotin, panthenol, and ginger extract.
Why it's worth it
Best for readers who prefer a gentle, mascara-wand formula that feels nourishing. The brand states biotin supports lash health, making it a good pick for lashes that feel brittle from frequent mascara use. It is vegan certified.
Caveat
The wand coats lashes generously, so excess product should be wiped off before application to avoid eye discomfort.
Kate Blanc Cosmetics Castor Oil Organic for Hair, Lashes, Face, Skin (2oz), 100% Pure, Cold Pressed, Hexane Free Hair Oil. Lash Serum for Thicker-Looking Eyelashes & Eyebrows
What it is
An organic, cold-pressed castor oil treatment for conditioning brows, lashes, hair, and dry skin.
Why it's worth it
Best for readers who prefer a simple, ingredient-minimal oil-based ritual. This is 100% pure, hexane-free castor oil with USDA Organic certification. The included applicator set makes it easy to use as a targeted brow or lash conditioner.
Caveat
Castor oil is rich and thick, so apply sparingly and keep away from the waterline to avoid irritation.
RapidLash Eyelash Enhancing Serum with HEXATEIN 1 Complex - Lash Serum for Eyelashes Conditioning & Hydrating - Longer-Looking, Fuller and Thicker Appearing Lashes - 3 mL / 0.1 fl oz
What it is
A lash serum with HEXATEIN 1 complex to condition and hydrate.
Why it's worth it
Best for readers who want a recognizable lash serum with a classic fine-tip applicator. The brand states its HEXATEIN 1 complex conditions lashes for a softer, healthier appearance. It is a practical choice for maintaining lashes between mascara, lifts, or extensions.
Caveat
Brand recommends applying carefully along the lash base only, as the serum may sting if it migrates into the eyes.
neuBROW Brow Enhancing Serum by Skin Research Laboratories - 3.6 mL Eye Brow Serum for Defined, Fuller & Thicker-Looking Hair Brows - Advanced Formula Promotes Natural & Healthy Appearance of Brows
What it is
A brow serum with peptides, proteins, and vitamins.
Why it's worth it
Best for readers who want a dedicated brow serum with a mini brush for precise application on gaps or tails. The brand states the formula promotes a natural, healthy appearance over time. It is a premium pick for a targeted brow routine.
Caveat
Priced higher than several alternatives; consider if a prestige format matters to you.
How to choose
How to choose the right eyebrow and eyelash growth serums for fuller features in 2026
Takeaway
Brow and lash serums can help condition and support a fuller appearance over time, but patience is key. Choose based on your specific concerns—sparse brows, brittle lashes, or both—and look for formulas that match your preferences in ingredients and application. Results vary, and consistent use is essential.
