Cilantro (Coriander) for Blood Sugar Regulation

Research suggests that coriander (Coriandrum sativum) may have meaningful blood sugar-lowering effects, with multiple preclinical studies demonstrating that various preparations of the plant, including seed extracts, essential oils, and isolated polyphenol fractions, can reduce serum glucose levels, stimulate insulin secretion, and improve insulin sensitivity in animal models of diabetes. Studies indicate these effects have been observed across a range of experimental conditions, including streptozotocin-induced diabetic rats, obese-hyperglycemic rats, and dexamethasone-induced insulin resistance models, lending some consistency to the findings across different research groups. The body of evidence currently consists entirely of animal studies and narrative reviews, with no published human clinical trials or meta-analyses identified, which is a significant limitation that prevents conclusions about whether these effects translate to humans. While the preclinical evidence is uniformly supportive in direction, the absence of randomized controlled trials in human populations means the research remains preliminary, and the field would benefit substantially from well-designed clinical studies before firmer conclusions can be drawn.