A topical vitamin D and UBIQUINOL supplement composition useful in treating oral inflammation and reducing oxidative stress comprising: a supplement mixture of vitamin D and UBIQUINOL in an aqueous-free emulsion containing: spilanthes extract, stabilizing compositions for UBIQUINOL and trans-oral mucosal absorption facilitators for the supplement mixture; where the emulsion forms a mucoadhesive gel in the presence of saliva, that effects passive diffusion through the oral mucosa of the supplement mixture and spilanthes extract regulating: in vivo availability and immune response of the supplement mixture, and maintaining adequate levels of circulating vitamin D and of adjunctively administered UBIQUINOL, while minimizing the risk of hypercalcemia.