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Head-to-head evidence comparison — which supplement is right for you?
Black Seed Oil and Probiotics are closely matched across evidence, studies, and safety.
Verdict
Likely helps
11 of 12 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
30 of 39 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Black Seed Oil and Probiotics have evidence — compare verdict strength side-by-side.
1-3g oil (or 200-400mg thymoquinone)
With meals
Cold-pressed oil softgels
10-20 billion CFU
With or without food (strain-dependent), Same time daily for consistency
Capsules with multiple strains
4-8 weeks
4-8 weeks
8-12 weeks
2-4 weeks
4-8 weeks
4-8 weeks
First 1-2 weeks
Does Nigella sativa supplementation improve cardiovascular disease risk factors? A comprehensive GRADE-assessed systematic review and dose-response meta-analysis of 82 randomized controlled trials
Pharmacological research (2025) · Meta analysis · n=5026
Our findings suggest that N. sativa could be a promising adjunct therapy for improving cardiovascular disease (CVD) risk factors.
A systematic review on anti-diabetic plant essential oil compounds: Dietary sources, effects, molecular mechanisms, and safety
Critical reviews in food science and nutrition (2024) · Systematic review
They can also significantly inhibit the generation of TBARS and MDA, reduce oxidative stress, increase insulin levels, adiponectin, and glycoprotein enzymes, boost antioxidant enzymes like SOD, CAT, and GPx, as well as reduce glutathione and vital glycolytic enzymes.
Effect of Nigella sativa Intake on Oxidative Stress and Inflammation in Patients with Metabolic Syndrome and Related Disorders: A Systematic Review and Meta-analysis of Randomized Controlled Trials
Current pharmaceutical biotechnology (2024) · Meta analysis · n=1033
In addition, SOD: (SMD: 1.35; (95% CI, from 0.77 to 1.93); P = 0.00) and TAC (SMD: 2.82; (95% CI, from 0.55 to 5.084); P = 0.01) levels significantly increased in the intervention group compared to the placebo group.
Preventive Effect of Probiotics on Oral Mucositis Induced by Cancer Treatment: A Systematic Review and Meta-Analysis
International journal of molecular sciences (2022) · Meta analysis · n=708
Three trials using Lactobacilli-based probiotics reported that the incidence of oral mucositis in the probiotic group was significantly low (risk ratio [RR] = 0.84, 95% confidence interval [CI] = 0.77−0.93, p = 0.0004).
Probiotics for treating acute infectious diarrhoea
The Cochrane database of systematic reviews (2020) · Meta analysis · n=12127
Effect size was similar in the sensitivity analysis and marked heterogeneity persisted.
Probiotics for the prevention of Clostridium difficile-associated diarrhea in adults and children
The Cochrane database of systematic reviews (2017) · Meta analysis · n=9955
A complete case analysis (i.e. participants who completed the study) among trials investigating CDAD (31 trials, 8672 participants) suggests that probiotics reduce the risk of CDAD by 60%.
Based on meta-analysis of 1086 participants showing significant reductions in CRP and TNF-α, but no effect on IL-6. High heterogeneity between studies limits confidence.
Based on meta-analyses showing benefits for IBS and digestive symptoms. Effect sizes varied considerably between studies with low to very low certainty of evidence. Initial GI symptoms common when starting but typically resolve within 1-2 weeks.
AI-estimated from published studies. Interpret as directional guidance.
Both Black Seed Oil and Probiotics are closely matched — the best choice depends on your specific health goals.
For reduce inflammation, Probiotics has a higher relevance score (95 vs 70).
No known interactions between Black Seed Oil and Probiotics have been documented in our database. However, always consult a healthcare provider before combining supplements.