Duodenum supplements contain dried tissue from the first part of the small intestine, typically from pigs or cattle. This section of the gut naturally handles bile and pancreatic enzymes. Some alternative medicine traditions use the tissue as a source of digestive cofactors.
People take these supplements alongside meals, hoping to prop up digestion and nutrient uptake. Direct clinical proof is scarce. What belief exists flows from traditional practice, not modern trials.
Safety information is thin. Avoid the product if you have an allergy to animal-derived materials. Speak with a doctor before starting, especially if you manage a digestive disorder or take any medications.