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

Designed by Obagi Medical, Nu-Cil is an eyelash-enhancing serum created to target the growth (anagen) phase of the lash cycle and support incremental improvement with daily use. The formula blends biotin, a lipid complex, sodium hyaluronate and panthenol—marketed together as NouriPlex Technology—to hydrate and condition each lash while promoting a fuller, more defined appearance. Suitable for use along the upper lashline, this physician-endorsed product is dermatologist and ophthalmologist tested.

How quickly can I expect to see changes in my lashes?

Individual results vary, but Obagi reports measurable improvements over weeks of consistent application. Clinical data from a 16-week blind study showed most participants noticed visible changes within that timeframe, with many noting increased thickness and density.

• Visible improvement reported by 93% of participants at 16 weeks.
• 89% observed thicker-looking lashes in the same study.
• Daily application along the lashline is recommended for best results.

What ingredients make Nu-Cil effective and how do they help?

Nu-Cil uses a targeted combination named NouriPlex Technology to condition and strengthen lashes. Each ingredient contributes a specific benefit—from biotin for hair health support to sodium hyaluronate for moisture retention—working together to promote a more conditioned lash profile.

• Biotin: supports overall lash appearance and resilience.
• Lipid compound: helps protect lashes and restore surface integrity.
• Sodium hyaluronate: attracts and holds moisture for smoother, healthier-looking hairs.
• Panthenol: conditions and improves manageability and shine.

Is Nu-Cil safe for sensitive eyes and daily use?

Obagi formulates Nu-Cil to be compatible with sensitive skin types and periocular skin, and the product has been dermatologist and ophthalmologist tested. As with any eye-area product, apply sparingly to the upper lashline and discontinue if irritation occurs; consult your eye care professional if you have preexisting eye conditions.

• Physician endorsed and clinically tested for safety.
• Designed for upper lashline application—small, precise doses.
• Stop use and seek advice if you experience irritation or unexpected symptoms.

How does Nu-Cil fit into my daily beauty routine?

Nu-Cil is formulated for simple integration: apply once daily to clean, dry skin along the upper lashline, much like an eyeliner. It layers easily under makeup and can be used alongside most other skincare and eye products—but allow the serum to dry before applying other treatments or cosmetics.

• Apply nightly or as directed to clean upper lashline.
• Let serum dry before applying mascara or eye makeup.
• Compatible with most skincare regimens; consult a provider for combination therapy.

Who is this for: Obagi Nu-Cil Eyelash Enhancing Serum is intended for adults seeking a clinically studied, physician-endorsed lash conditioner to help lashes appear fuller, thicker and more defined. It suits people who want a lightweight, easy-to-use product that fits into existing skincare and makeup routines, including those with sensitive ocular skin who prefer dermatologist- and ophthalmologist-tested formulations. If you have a history of eye disease, recent eye surgery, or are under medical treatment affecting eyelashes, consult your 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