Digestive enzymes are most effective when matched to the appropriate issue. A random blend of enzymes may not be an effective digestive aid. Although many products are marketed with broad claims for digestion and health, proven benefits are limited to certain conditions. For those with lactase deficiency, fructose intolerance, or galacto-oligosaccharide sensitivity, supplementing with adequate doses and appropriate timing of the target enzyme has been clinically shown to improve symptoms. If you do not have digestive symptoms, an enzyme supplement is unlikely to provide a noticeable benefit.