Physicians Formula Lash-Enhancing Eyeliner Serum — Blackest Black, Ultra-Fine Waterproof & Conditioning

Physicians Formula Eye Booster is a 2-in-1 ultra-fine liquid eyeliner that outlines eyes in intense black while depositing a lash-conditioning serum at the lash base.

This waterproof, fast-drying liquid liner combines precise definition with a lash-focused serum blend so you get the look of sharp, saturated eyeliner and a conditioning treatment in one step. Formulated to be dermatologist-approved, hypoallergenic, cruelty-free and vegan, it is created to glide on smoothly, resist smudging, and deliver pigment where you need it most: along the lash line.

How does this eyeliner deliver both pigment and lash care?

The slim applicator deposits a rich, Blackest Black pigment while the formula places a lash-enhancing complex at the base of lashes. That dual action separates the functions—visual definition from the pigment, and conditioning from the serum—so each application gives immediate eye definition plus ongoing lash-targeted ingredients.

• Ultra-fine tip for precise application and tight-lining.
• Waterproof pigment with quick-dry finish to reduce transfer and smudging.
• Built-in lash-conditioning serum and peptides applied where lashes meet the lash line.
• Dermatologist-approved and hypoallergenic formulation suitable for sensitive eyes.

Will it stay put during a long day or in humid conditions?

The formula is engineered to be water-resistant with a fast-ink dry finish so it resists smearing, running, and fading under typical daily conditions. While resistant to moisture and oils, removal with a suitable eye makeup remover is recommended at day’s end for gentle cleansing.

• Waterproof complex reduces transfer and improves endurance.
• Fast-drying ink minimizes smudging immediately after application.
• Designed for everyday wear from morning routines to evening events.

How do I apply it for the best results and where should I place the serum?

Use the ultra-fine tip along the base of your upper lashes for natural definition or create a crisp wing for more drama. For maximum serum benefit, apply as close to the lash line as comfortably possible so the conditioning components reach the lash base with each stroke.

• Start at the inner corner, glide the tip along the lash line to the outer corner.
• For tight-lining, gently lift the lid and draw along the waterline base where appropriate.
• Allow a few seconds to dry before blinking or applying other eye makeup.

What ingredients and skin types is this liner suited for?

The formula highlights a waterproof complex, lash-conditioning serum and peptides—ingredients chosen to condition and visibly enhance the lash area while preserving the intense pigment. It’s labeled for combination skin and formulated to be hypoallergenic and dermatologist-approved, making it suitable for many sensitive eye types.

• Key actives: waterproof complex, lash-conditioning serum, peptides.
• Dermatologist-approved and hypoallergenic for sensitive skin considerations.
• Cruelty-free and vegan formulation aligns with ethical preferences.

Who is this for? This dual-purpose liner is made for anyone who wants the precision of a high-pigment liquid eyeliner plus the convenience of a lash-conditioning treatment in a single product. It’s especially useful for people who prefer streamlined morning routines, wear eyeliner daily, or seek a hypoallergenic, vegan option with reliable wear. Avoid direct contact with the eye itself; if irritation occurs, discontinue use and consult a specialist.

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]