What it is: A highly concentrated, clinically tested lash serum that creates the look of longer, thicker, stronger, and healthier lashes in as little as four weeks.Highlighted Ingredients:- Olaplex Peptide Complex Technology™: Proprietary blend to support the natural growth cycle and lash retention. - Olaplex Bond Building Technology™: Supports the skin barrier for a better environment for natural lash growth.- Hyaluronic Acid and Biotin: Promotes healthy-looking lashes and reduces the feel and look of dry, brittle lashes. Ingredient Callouts: This product is vegan, gluten-free, and cruelty-free.What Else You Need to Know: This lightweight serum delivers powerful lash enhancers, including Olaplex Peptide Complex Technology™ to support the natural growth cycle and lash retention. See more conditioned, healthier-looking lashes in as little as two weeks and longer-, fuller-looking lashes in as little as four weeks.*Clinical Results: As reported by participants at the conclusion of a 12-week consumer-perception clinical study of 33 subjects with 2X daily use:- 97% reported improvement in the appearance of denser lashes- 97% reported improvement in the appearance of longer lashes- 100% reported improvement in the appearance of thicker lashes**Results may vary. OLAPLEX products are thoroughly tested in accordance with industry standards in-house and by independent third-party laboratories for safety and efficacy