What makes aloe soothing? How does kigelia extract firm skin? Jennifer Hirsch, a botanist who trained at the Royal Botanic Gardens, Kew, has studied ethnobotany and worked with NGOs to research botanical business diversification for communities around the world. Now, she helps beauty brands bring the power of plants to their products. In this episode, she shares stories from her travels and explains how botanicals like ashwagandha, argan, and cucumber can improve skin and hair—and which herbal supplements have side effects to watch out for.