I adore the Tiam My Signature C Source Serum and what it does for my skin. It’s an absolute HG product for me. So when I saw that Tiam had released a second, different, RED version, I was hyped to try it. Tiam very kindly sent me a bottle (and, even more kindly, a second bottle after my first oxidized when I stupidly traveled with it in a hot suitcase) to try and compare to their original! So here are my thoughts after using the My Signature Red C Serum consistently for around 6 weeks.