Lately, the FDA has been issuing a wave of Warning Letters to OTC sunscreen manufacturers. Korean manufacturers are no exception. Across all these letters, the core issue remains exactly the same: It’s not just about a faulty product; the entire manufacturing quality system is failing to function. In South Korea, sunscreen is classified as a "functional cosmetic." Because of this, many brands and manufacturers mistakenly assume: "We passed the SPF testing, so we should be fin