QUALITY AND SATISFACTION GUARANTEED: At LILASH we pride ourselves on providing natural and effective lash and brow serums. We stand behind our products, and we want you to be happy! If you need a return or exchange for any reason, just let us know. Our US-based team will be here to assist you. We stand by our serum with a complete 90-day satisfaction guarantee. SAFE FOR SENSITIVE SKIN: Physician-formulated serum and ophthamologist tested, making it safe for sensitive skin. Purified and gentle - perfect for sensitive skin or thin, sparse hairs. VEGAN, NATURAL, AND CRUELTY FREE: Our eyebrow serum is made with natural vitamins, minerals, and ingredients. None of the ingredients are tested on animals or derivitive of animal products. Serums are also paraban-free!. THICKER & DARKER BROWS: The LiBrow formula enhances your brows in both thickness and color. It penetrates your hair follicles to encourage your hair to grow back stronger and denser, along with a natural tint to enhance the pigment of your brow color. EASY TO USE: LiBrow is an easy, once-a-day application process that fits into your regular morning or evening routine. Apply the eyebrow serum under the arch of your brows or into any patchy areas that need extra growth or thickening - and the serum does the rest!.