All linked products are independently selected by our editors. If you purchase any of these products, we may earn a commission. Photo: Courtesy of Jenny Jin Despite over a decade of testing products under my belt, I still get a flutter of excitement around new launches —and even I can’t resist the pull of pretty packaging. But as a seasoned beauty expert , I’ve also developed a healthy instinct for separating true innovation from really, really good marketing. That tension—hope versus skepticism—is exactly what brought me to Medicube ’s new Rosemary PDRN Hair Care line. The three-step system, consisting of a shampoo , conditioner , and rollerball scalp serum , promises to strengthen hair from root to tip, with the goal of making it look fuller, smoother, and overall healthier. It’s an ambitious claim, especially in a hair care market crowded with growth- and repair-focused formulas that promise Rapunzel-like results.…