I used to use the no.2, but I switched over to the M after I finished that. The texture compared to the other metabolizers is more gel-like, moer tot he conventional moisturizer types. It's really incredible how the moisturizing beads in this melt into your skin leaving it smooth and dewy feeling. Plus there is no sticky after all, doesn't clog my pores and best of all it can be used on the eye area!! IPSA's definitely a keeper and I'll try the M in othere ranges when i finish this bottle.