I’ve been on quite the oil kick these days. As my skin gets more — ahem — mature, I’m finding that an oil-based skincare regimen gives me results that I just don’t see from creams and cleansers. But then I met an old friend from high school recently who was literally GLOWING, and she mentioned that she had added a serum made from squalene to her nighttime ritual. “Squalene?” I frowned. “Like from shark fins?” My friend is a serious animal lover. I couldn’t imagine her using that. “No, silly,” she said. “It’s plant-based squalane.”