A-Game Retinaldehyde Serum.

"This is the one I have used and tested the longest, starting way back last year. This one is still probably my favorite of all the budget retinaldahhides I've ever tried. It actually comes in three strengths: a 0.05, a 0.1, and a 0.2, similar to the concentration that's in the 2 prequel. I really love that because if you've never used a retinoid, I don't love starting at 0.1. I really really like starting at 0.05 and you can do that with the A-Game 5. I love Geek & Gorgeous brand because they are really everything I look for in a skincare brand. They're super transparent with how they formulate their products. They tell you the pH of the product. They tell you percentages of everything that's in the product. They tell you where they source things so that we know they're stable. They're very into the science behind the skincare, which really speaks to me as a dermatologist. I find all of their products extremely thoughtfully formulated."