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.
Citations from PubMed and preprint sources. Match score (0-100) reflects automated search ranking, not clinical appraisal.
| Title | Type | Year | Direction | Match |
|---|---|---|---|---|
| Black Cumin Seed (Nigella sativa) Confers Anti-Adipogenic Effects in 3T3-L1 C... | Other | 2025 | Supports | 72 |
| Protective Effect of Nigella sativa Seed Extract and its Bioactive Compound T... | Other | 2023 | Supports | 67 |
| Nutraceutical activities of Trigonella foenum-graecum and Nigella sativa seed... | Other | 2024 | Supports | 62 |
| Nigella sativa improves glucose homeostasis and serum lipids in type 2 diabet... | Meta-analysis | 2017 | Mixed | 57 |
| Effects of Nigella sativa on glycemic control, lipid profiles, and biomarkers... | Meta-analysis | 2020 | Supports | 52 |
| Comparative effects of olive oil and Nigella sativa oil on mice lipid profiles. | Other | 2025 | Supports | 47 |
| Potential protective effects of Nigella sativa and Allium sativum against fru... | Other | 2014 | Supports | 42 |
| Antihypertensive effect of Nigella sativa seed extract in patients with mild ... | RCT | 2008 | Supports | 37 |
| Hypoglycemic effect of lipoic Acid, carnitine and nigella sativa in diabetic ... | Other | 2011 | Mixed | 32 |
| Phytochemical Profiling and Biological Activities of Nigella sativa Vinegar E... | Other | 2025 | Supports | 27 |
| The Effects of 8-week Nigella sativa Supplementation and Aerobic Training on ... | Other | 2014 | Supports | 22 |
| Effect of the herbal medicines in obesity and metabolic syndrome: A systemati... | Meta-analysis | 2020 | Supports | 17 |