What the Research Says
Digestive enzymes are essential for addressing pancreatic exocrine insufficiency, where pancreatic enzyme replacement therapy (PERT) is the standard treatment. For specific food intolerances such as lactose intolerance and legume sugar malabsorption, single-enzyme products like lactase and alpha-galactosidase are well-supported by evidence. However, the use of over-the-counter (OTC) broad-spectrum enzymes for functional dyspepsia remains an emerging area with growing research support.
A systematic review by Prpa et al. (2021) highlights that polyphenol-rich fruit extracts can inhibit α-amylase more effectively than α-glucosidase, suggesting potential interactions between dietary components and digestive enzyme activity. In a randomized, double-blind, placebo-controlled trial involving 30 middle-aged and older adults, Deutz et al. (2026) found that oral multienzyme supplementation increased postprandial glucose and non-esterified fatty acid (NEFA) levels compared to placebo, indicating a possible role in nutrient metabolism.
Animal studies have also demonstrated benefits of enzyme supplementation. Zhu et al. (2025) reported that combining essential oils, Saccharomyces cerevisiae, and isomaltooligosaccharides improved intestinal absorption and immune functions in weaned piglets. Similarly, Badawy et al. (2025) found significant improvements in growth performance, immune function, and gut health in rabbits supplemented with Laurus nobilis extract.
Despite these advancements, a key limitation remains: many OTC products lack the rigorous testing standards applied to prescription PERT products, which may affect their efficacy and safety profiles.
