I've always been interested in investing in stocks and real estate, but I've been too stingy with my skin. In my late 30s, I decided it was time to start investing in my skin before it was too late, so I tried out some popular functional ampoules and Riddle Shot products. At first, the tingling sensation felt a bit strange, but with consistent use, I could see my skin texture becoming more refined and my pores tightened. While they aren't expensive luxury brands, I feel like investing even a small amount in products with reliable ingredients is paying dividends in terms of improved skin condition. I was particularly concerned about my complexion darkening as I got older, but since I've started using products containing vitamin C, I've been hearing a lot of comments from people around me about how my complexion has improved. It seems the earlier you start taking care of your skin, the better the return.