Vegan brow serum delivers thicker, fuller and denser looking brows in as little as 4 weeks with full results in 12 weeks. Botanical actives revitalize and nourish brow skin to help restore the overall appearance of brows. Vegan. 96% naturally derived. Cruelty free. Safe. Non-irritating. Dermatologist & Ophthalmologist tested.100% saw an improvement in overall brow fullness*For thinning or sparse brows. Aveda invati browâ„¢ thickening serum - 0.17 fl oz/5 ml