An aluminum-free antiperspirant/deodorant composition is disclosed. The aluminum-free antiperspirant/deodorant composition may include an oil-in-water emulsion base and an antiperspirant active dispersed in the oil-in-water emulsion base. The antiperspirant active may be primarily an amino acid, calcium carbonate and optionally a zinc-based antiperspirant active and the oil-in-water emulsion base may include an emulsifier having a mixture of steareth-2 and steareth-20 a plant-based oil, a polyol, and water. The zinc-based antiperspirant active may be free of zinc oxide-amino acid-halide complexes, amino acid-halides, and chelated zinc oxide complexes.