I'm curious about the effects or reviews of Quadsay.

While browsing a beauty blog, I happened to come across a post stating that Quadsay is really good for improving the skin barrier and fine elasticity. I’ve heard of commonly known products like Rejuran and Exosomes, but since this was the first time I’d heard the name Quadsay, I became curious. I’m wondering if this is a recently released type of skin booster, or if it is an exclusive home care ampoule ingredient used only at specific dermatology clinics.

I've searched on Naver and YouTube, but I only see promotional posts and there aren't many reviews from people who bought it with their own money, so I'm hesitant to give it a try. If anyone has personally received the Quad Say program treatment at a dermatology clinic or aesthetic center, could you please share a detailed review regarding the actual effects you experienced, how long the results lasted, and the price range?