I have not had any problems with Mama Bear's soaps; however, I tend to only use Essential Oil varieties and avoid fragrance oils when I can. My skin reacts to sandalwood, Bay rum, Sage, and other unknown fragrances. However, that is just my reactions. Others use the same products without any issues at all. I can use the C.O. Bigelow version of the Proraso cream without issues. However, other forum members get reactions from the menthol. I have had problems with Noxzema deep cleansing treatment (suggested in a thread on another site for pre-shave treatment) and some of the Nivea products. However, I don't recall which ones.