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DHA-PL and EPA-PL may effectively protect mice against intestinal dysfunction under chronic stress exposure.

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Natural compounds have tremendous potential to regulate glucose metabolism, but conventional methods for studying their bioactivities are usually labor intensive. Here, hypoglycemic properties in 22 selected food‐derived compounds were examined using molecular docking. The results indicated that curcumin is an inhibitor of both α‐glucosidase and dipeptidyl‐peptidase 4 (DPP‐4), which are important for glycemic control. These effects of curcumin were also confirmed by enzymatic determination in vitro. Furthermore, curcumin significantly improved diet‐induced hyperglycemia (e.g., fasting plasma glucose levels and glycogen storage in muscle or liver) in mice. This might be attributed to its inhibitory effects on the activities of α‐glucosidase and DPP‐4 in vivo. Curcumin also upregulated the expression of genes (e.g., glucagon‐like peptide 1) related to DPP‐4 activity in the small intestine. In conclusion, curcumin is a potential ingredient of functional foods used for diet‐induced hyperglycemia management. Practical applications Curcumin has been widely used as a colorant in the food industry. Moreover, a growing number of studies have described its diverse biological functions, such as anti‐inflammatory, anti‐oxidant, and anti‐angiogenic activities. Thus, curcumin is regarded as a potential ingredient in functional foods. Our results highlighted the hyperglycemic effect of curcumin, suggesting that curcumin may be included in food products for hyperglycemic patients.

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