Q&A: Can we use food grade herbal supplements in our skin care products?

In the February Q&A, Marina asked, Hello, Susan (and everyone else!), what’s your opinion on using dry herbal extracts being sold for health supplements for skin care? Horse chestnut extract sounds intriguing to me, which I first found at New Directions Aromatics. Because of higher shipping cost and minimum order fee from NDA, I looked for…