B Stress Complex™ naturally contains carbohydrates, lipids, proteins (including all ten essential amino acids), and superoxide dismutase as found in specially grown, enzymatically processed Saccharomyces cerevisiae, Rice bran Oryza sativa, and Alfalfa sprouts & plant Medicago sativa. 
Unlike many so-called "natural" formulas, B Stress Complex™ contains no synthetic USP nutrients or isolated mineral salts, but only contains foods, food complexes, and food concentrates.