Organic Castor Oil Eyelash & Brow Serum – 100% Pure, Cold-Pressed, Hexane-Free Conditioning Oil for Fuller-Looking Lashes & Brows ⭐️⭐️⭐️⭐️⭐️. Pure, Organic Castor Oil Serum for Lashes & Brows – Muse by Elavié Castor Oil Serum is cold-pressed, hexane-free, and USDA Certified Organic, carefully crafted to enhance and nourish brows and lashes.