Dr.G named this toner after 7-dehydrocholesterol, the cholesterol relative that sits in living skin and turns into vitamin D when sunlight hits it. It is on the list at thirty-one, and Korean coverage led with exactly that when the toner launched — the provitamin D angle was the news. Read it as a barrier lipid, not a supplement.

Korean name: 닥터지 더모이스처 배리어.D 리퀴드 토너
Size: 200ml