Abstract: The present invention provides methods of treating humans and animals with terpenes and terpenoids in order to restore the stratum granulosum and stratum corneum and treat a dermatological disease, such as, for instance atopic dermatitis. More specifically it provides terpenes and terpenoids such as monoterpenoids, sesquiterpenes and norisoprenoids as ingredients that work to restore and thicken the stratum granulosum and stratum corneum and treat a dermatological disease. Terpenes and terpenoid compounds support the cell proliferation, cell differentiation, growth of skin, skin tissue and keratinocytes by upregulating genes for loricrin filaggrin, caspase 14, hornerin and other late cornified envelope components and vascular endothelial growth factor (VEGF) and downregulation of matrix metalloproteinases. Both terpenes and terpenoids may be applied topically or orally at oral or topical concentrations from about 0.