Skinceuticals METACELL B3! is a passion project that has been 6 years in the making and is truly revolutionary, with an unparalleled level of scientific research on the early symptoms of photoaging. Metacell B3 is ideal for all that are exhibiting early indications of photoaging, those who are seeking "prejuvination," as an adjunct to clinical procedures and therapies, or to maintain professional treatments such as peels.