Obagi Medical Nu-Cil Eyelash Enhancing Serum 0.1 oz — Biotin Lash Serum for Thicker, Defined Lashes

Obagi Nu-Cil is a professional-grade eyelash enhancing serum formulated with NouriPlex Technology and biotin to help lashes appear thicker, more defined, and visibly improved over time.

Designed by Obagi Medical, Nu-Cil targets the anagen (growth) phase of the lash cycle with a concentrated blend of biotin, lipid compound, sodium hyaluronate and panthenol. The formula is dermatologist- and ophthalmologist-tested, and clinical data from a 16-week blind study showed high participant-reported improvements in lash appearance. Use this serum as part of your nightly routine to support gradual enhancement of lash thickness and density.

How does Nu-Cil help lashes look fuller and more defined?

Nu-Cil combines nourishing actives that hydrate and support the visible thickness and definition of the lash line. Rather than instant volumizing fibers, the serum works with the natural lash growth cycle to build results over weeks.

• Biotin: supports visible strength and healthier-looking lashes.
• Lipid compound: helps condition the lash surface for smoother appearance.
• Sodium hyaluronate: retains moisture to plump and hydrate lashes.
• Panthenol: aids in maintaining lash flexibility and shine.

When will I notice changes in my lashes after starting Nu-Cil?

Individual timelines vary, but clinical feedback indicates visible improvement builds over several weeks. Many users report incremental differences in density and thickness during the first 8–16 weeks of consistent nightly use.

• Initial hydration and smoother lash surface: within days to weeks.
• Noticeable thickness and definition: typically 8–12 weeks.
• More densely packed appearance: often reported by 16 weeks in clinical observations.

Is Nu-Cil safe for sensitive eyes and contact lens wearers?

Nu-Cil is formulated to be ophthalmologist-tested and created with ingredients selected for tolerability. Users with sensitive eyes or contact lenses should follow usage directions and consult their eye care professional if irritation occurs.

• Ophthalmologist and dermatologist tested for tolerability.
• Apply along the lash line; avoid getting product directly in the eye.
• Discontinue and seek guidance if persistent irritation appears.

How do I apply Obagi Nu-Cil for best results?

Apply Nu-Cil nightly to clean, dry lash lines, using the precision applicator to place a thin line at the base of the upper lashes. Consistent application each evening helps ensure the active ingredients can support the lash growth phase effectively.

• Use once nightly on upper lash line only, after cleansing.
• Allow serum to dry before applying other products or sleeping.
• Do not exceed recommended frequency; keep out of eyes and rinse if contact occurs.

Who is this for: Obagi Nu-Cil Eyelash Enhancing Serum is suited for adults seeking a dermatologist- and ophthalmologist-tested lash treatment to support fuller-looking lashes over time. It is appropriate for individuals who want to improve visible lash thickness and definition through a nightly serum routine rather than immediate cosmetic volumizers. If you wear eye makeup, remove makeup thoroughly before application; if you have active eye disease or are pregnant or nursing, consult a physician before use.

Ingredients

Water (Aqua), Dehydrolatanoprost, Biotin, Panthenol, Sodium Hyaluronate, Phenoxyethanol, C12-15 Alkyl, Benzoate, Caprylyl Glycol, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Alcohol, Sodium Hydroxide, Phenethyl Caffeate