Spirulina for Blood Sugar Regulation

Research suggests that spirulina supplementation may support blood sugar regulation, with the evidence base drawing from multiple meta-analyses of randomized controlled trials, systematic reviews, narrative reviews, and preclinical animal and in vitro studies, all pointing in a consistently supportive direction. Studies indicate that spirulina and its active compound phycocyanin are associated with reductions in fasting blood glucose, post-prandial blood sugar, glycosylated hemoglobin, and insulin resistance markers such as HOMA-IR, with proposed mechanisms including preservation of glucose transporter expression, support for insulin secretion, and protection of pancreatic beta-cell function. The breadth of this literature spans diabetic animal models, overweight and obese adult populations, and type 2 diabetes patients specifically, suggesting the effects may be relevant across different metabolic contexts. That said, much of the mechanistic evidence comes from animal and laboratory studies, and while the human clinical data is encouraging, the overall body of research would benefit from larger, longer-duration trials with standardized dosing and formulations before firm conclusions can be drawn.