Black Seed (Nigella Sativa) for Cholesterol Management

Research suggests that Nigella sativa supplementation is associated with improvements in multiple lipid markers, including reductions in total cholesterol, LDL, triglycerides, and VLDL, along with increases in HDL cholesterol, across a range of study types. The evidence base includes two meta-analyses drawing on dozens of randomized controlled trials, a smaller meta-analysis focused specifically on type 2 diabetes, a double-blind placebo-controlled human trial, a human clinical trial using powdered seed, and several animal studies — the large majority of which point in a supportive direction. Studies indicate that both the powdered seed and oil forms have shown lipid-lowering effects in humans, though one meta-analysis noted that effects on triglycerides and HDL were not always statistically significant overall, and a subgroup finding suggested the two forms may behave differently with respect to triglycerides. Limitations across the evidence base include a reliance on small trials, considerable variation in dosage and formulation across studies, and a substantial portion of the mechanistic work being conducted in animal models, meaning that while the overall signal is encouraging, researchers consistently call for larger and more rigorously controlled human trials before firm conclusions can be drawn.