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Head-to-head evidence comparison — which supplement is right for you?
Alpha Lipoic Acid vs Black Seed Oil: Alpha Lipoic Acid has the stronger overall evidence (7 vs 6.5/10); they're alternatives for inflammation-related symptoms — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Alpha Lipoic Acid wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
8 of 10 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
10 of 11 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (2)
Outcomes where both Alpha Lipoic Acid and Black Seed Oil have evidence — compare verdict strength side-by-side.
300-600mg
On empty stomach for best absorption, 30-60 minutes before meals
R-Alpha Lipoic Acid (R-ALA) — the natural form
1-3g oil (or 200-400mg thymoquinone) (a typical label dose, the cited trials do not state a fixed daily dose)
With meals
Cold-pressed oil softgels
4-12 weeks
4-8 weeks
2-4 weeks
4-8 weeks
4-8 weeks
8-12 weeks
Effects of Oral Alpha-Lipoic Acid Treatment on Diabetic Polyneuropathy: A Meta-Analysis and Systematic Review
Nutrients (2023) · Meta analysis · n=1242
ALA treatment produced favorable results for TSS (a dose-related trend was observed), NDS, and the global satisfaction score.
Effects of selected dietary supplements on migraine prophylaxis: A systematic review and dose-response meta-analysis of randomized controlled trials
Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology (2025) · Meta analysis
Twenty-two trials were included in the systematic review and meta-analysis.
The Effect of Dietary Supplements on Male Infertility in Terms of Pregnancy, Live Birth, and Sperm Parameters: A Systematic Review and Meta-Analysis
Nutrients (2025) · Meta analysis
Systematic review and meta-analysis of 50 placebo-controlled trials of dietary supplements lasting at least 12 weeks in infertile men.
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
GRADE-assessed meta-analysis of 82 studies (79 quantitative) in 5,026 participants, with Nigella sativa doses from 200 to 4,600 mg a day for 1 to 48 weeks.
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
Meta-analysis of 16 RCTs in 1,033 people with metabolic syndrome and related disorders.
The points come from the SYDNEY 2 trial (PMID 17065669), which gave 181 people with diabetic polyneuropathy 600, 1,200 or 1,800 mg once daily or placebo for 5 weeks. All three doses beat placebo on the Total Symptom Score, with about the same size of effect: responder rates (a 50% or greater fall) were 62%, 50% and 56% against 26% on placebo, and effectiveness here is the responder rate above placebo. Nausea, vomiting and vertigo rose with dose, and the authors judged 600 mg once daily the best balance of benefit and risk. Doses below 600 mg were not tested. A 6-month trial of 1,200 mg a day in 200 patients (PMID 32370731) found benefit with mild nausea in 6 patients and no withdrawals, which is the basis for the 1,200 mg ceiling. A meta-analysis of 10 trials reported a dose-related trend in symptom scores (PMID 37630823), which the one head-to-head dose trial did not show.
AI-estimated from published studies. Interpret as directional guidance.
Alpha Lipoic Acid has a higher evidence score (7/10 vs 6.5/10) and wins in 2 of 3 categories.
For inflammation-related symptoms, Alpha Lipoic Acid has a higher relevance score (80 vs 70).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.