Ramie Gulyas, owner of Evanston apothecary The Alchemist’s Wife at 1810 Central St., has been mixing natural skincare formulas for more than 10 years. So, [unlike] most ingredients you don’t necessarily feel, you will feel vitamin C,” she said. “I always recommend pairing things with hyaluronic acid, and we customize several of our hyaluronic acid serums, like our green tea serum,” she said. They are just too aggressive.”For adult skin, Gulyas suggested gentle exfoliating five times a week, but staying clear of the eyes. “The key is you must know the percentage of the acids or other active ingredients in any of products,” Gulyas said.