The invention relates to compositions comprising cell culture medium conditioned by cells grown in three-dimensional culture. The cells used to condition the medium may be genetically modified to alter the concentration of growth factors and antioxidants in the medium. The conditioned cell medium (conditioned medium) may be used for at least one of cosmetic applications, cosmeceutical applications, and pharmaceutical applications, among other things. The invention also relates to proteins comprising a heterologous sequence that enhances cell penetration. The invention also relates to cells comprising DNA encoding such proteins. Methods for preparing the inventive compounds are also provided.