Review: Meg, a reviewer, received the YELLOMELLO DROP by SERUMKIND as a free trial product and was pleasantly surprised by its effectiveness. She found that when used in conjunction with the Cosrx Nail Mucin and the Soonjung Hydro Barrier Face Moisturizer, it made a noticeable difference. Meg specifically applied it to her T-zone every night. She highly recommends giving this product a try, emphasizing its impressive results.