Excellent Skin Trouble Care. This is the toner that contains houttuynia cordata extract to the highest level, which is good for skin trouble care. Heartleaf is very effective for calming skin troubles. Optimized Skin's Oil & Moisture Balance. This slightly acidic toner with a pH of 5.5 to 6 present you oil and moisture balance through an optimized ingredient design. Non-irritating dead Skin Cell Care. Non-irritating dead skin cell care makes it possible to prevent the occurrence of skin trouble and conduct intensive care. Reliable Formula without Harmful Ingredients. 11 kinds of food grade ingredients are composed of base and all ingredients are EWG green grade, so you can use it with confidence.