You really do feel tingling upon application — it's kind of like what I'd imagine using a microneedling device feels like.

Promising review: "I didn't know I needed this until I tried it! Even after just two consecutive uses, I swear my forehead was more plump, the 'elevens' and my frown lines were far less visible and smooth, my smile lines were more filled in, and my under eye bags were also more smoother — like they'd been ironed out. My fine lines were still there, but the skin underneath my eyes were less crepe-y and just looked more plump overall. I use this serum after my toner and essences, along with my other serums and before moisturizer at night. Because it is a bit thicker in consistency and has a bit of slip to it, I don't prefer to use it during the day, but I've been waking up with an even plumper, healthier looking complexion ever since I began using it." —MichelleHaha