This Tightening & Brightening Extracts Sample Set includes four water-soluble botanical extracts — caffeine, ginseng, white tea, and green tea — which are commonly used in formulations intended to help the skin appear refreshed. Ideal for under-eye products, face creams, serums, and masks, this set allows makers to explore natural ingredients that are often chosen for products aiming to support the look of smoother, more vibrant skin.