Physicians Formula Eye Booster Lash-Enhancing Eyeliner Blackest Black — Waterproof, Ultra-Fine Tip & Peptide Serum

Physicians Formula Eye Booster is a 2-in-1 ultra-fine liquid eyeliner that defines the lash line and deposits a lash-conditioning serum for stronger-looking lashes with a deep black finish.

This waterproof liquid eyeliner combines precision lining with a lash-enhancing complex: an ink formulated to deliver rich "blackest black" pigment while a peptide-enriched serum conditions the base of lashes. Dermatologist-approved, hypoallergenic, cruelty-free and vegan, it’s designed for everyday wearers who want sharp definition and a product that cares for lashes as it lines.

How does this eyeliner deliver both precise lines and lash care?

The applicator is an ultra-fine tip that produces clean, controlled strokes; the formula dries quickly to a smudge-resistant finish. Simultaneously, the formula contains a conditioning complex with peptides applied at the lash base to improve lash appearance over time without weighing down the line.

• Ultra-fine felt tip for pinpoint control and smooth strokes.
• Fast-drying waterproof ink that resists smudging and running.
• Peptide-enriched lash-conditioning serum targets lash root area.
• Dermatologist-approved and hypoallergenic for sensitive skin types.

Will this stay put during long days or humid conditions?

The high-tech waterproof complex is formulated to remain intact through humidity and everyday activities, minimizing transfer and flaking. While designed for long wear, remove gently with an oil-based or makeup remover formulated for waterproof eye makeup.

• Waterproof formulation reduces smears and seasonal wear.
• Quick ink-dry finish locks lines in place.
• Removes with standard waterproof eye makeup removers.
• Best for layered looks where staying power is essential.

How do I use it to maximize lash-conditioning benefits?

Apply the liner along the lash line in the usual way to define eyes; for conditioning results, ensure the product contacts the base of lashes as you draw. Regular daily use is recommended to allow the peptides and conditioning agents to build visual improvement in lash appearance over time.

• Draw at the base of lashes to deposit serum where it can work most effectively.
• Use once daily as part of your morning routine for consistent benefit.
• Layer a thin line—product is concentrated and effective with minimal application.
• Follow with gentle removal at end of day to preserve lash health.

Is this suitable for sensitive eyes and ethical shoppers?

Yes—this eyeliner is formulated to be hypoallergenic and dermatologist-approved to suit combination and sensitive skin types. It’s also cruelty-free and vegan, so it aligns with ethical preferences for animal-friendly cosmetics.

• Hypoallergenic formulation reduces irritation risk for sensitive eyes.
• Dermatologist-approved for safety on delicate eye skin.
• Cruelty-free and vegan certification for ethical sourcing and testing.
• Ideal for wearers who prioritize clean, compassionate beauty choices.

Who is this for: Ideal for anyone seeking a single-step solution that combines sharp, waterproof eyeliner with lash-conditioning care — from makeup minimalists who want a precise, reliable line to beauty enthusiasts adding a conditioning boost to their daily routine. If you want intense black pigment plus a peptide-infused serum in one dermatologist-approved, cruelty-free product, Physicians Formula Eye Booster Lash-Enhancing 2-in-1 Eyeliner Serum in Blackest Black is designed to fit into your everyday makeup bag.

Ingredients

INGREDIENTS: WATER/EAU, ACRYLATES/ETHYLHEXYL ACRYLATE COPOLYMER, PROPYLENE GLYCOL, LAURETH-21, ACRYLATES/DIMETHYLAMINOETHYL METHACRYLATE COPOLYMER, PEG-40 HYDROGENATED CASTOR OIL, PHENOXYETHANOL, SODIUM DEHYDROACETATE, SODIUM LAURETH-12 SULFATE, CAPRYLYL GLYCOL, ETHYLHEXYLGLYCERIN, C11-15 PARETH-7, BUTYLENE GLYCOL, POTASSIUM SORBATE, DEXTRAN, ACETYL TETRAPEPTIDE-3, TRIFOLIUM PRATENSE (CLOVER) FLOWER EXTRACT, BLACK 2 (CI 77266). [1901-1]