If all the online buzz is to be believed, this plant-based serum may be the holy grail of skincare. Blogger accolades (from Millennials, mostly) include phrases like radiance-boosting, cystic-acne-curing, fine-line-plumping, dark-spot-fading. Many also contend it's such an effective all-in-one, they’ve tossed the rest of their regimen. (I assume/hope this excludes their cleanser and sunscreen.) So how well does it fare on a 40+ face? I intend to find out.