Purelash Lash Extender and Conditioner adds measurable thickness and length to lashes when used as a primer for mascara. Allows you to use less mascara. Can be used on eyebrows and worn alone at nighttime as a lash treatment. key ingredients: Algae Extract Conditions and protects brow hairs, making them healthier, smoother and more manageable. Panthenol Vitamin B Complex Factor. Used to condition hair. Hydrolyzed Wheat Protein Thickens, curls and strengthens lashes.