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Irvingia Gabonensis
A West African seed extract marketed aggressively for weight loss. A handful of small, mostly single-laboratory trials (the Ngondi/Oben group in Cameroon) report weight and lipid improvements — but a systematic review found the trials poorly reported and the effect unproven, with no independent replication.
What the evidence says
Most African Mango studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from high-quality randomised trials published 2005–2025 with a typical study size of 102 participants.
Based on 8 studies · 5 RCTs · 2,727 total participants
Confidence
High confidenceBy outcome
A few small RCTs report weight and lipid improvements, but all come from one Cameroon group with poor reporting, and a systematic review concluded the effect is unproven.
3 trials ongoing or recruiting · 4 completed on ClinicalTrials.gov
1 of the completed trials have posted results
Registered trials show research momentum for African Mango, not proof of effect — a registration is a plan, and posted results are sponsor-reported, not peer-reviewed. They are never counted toward the evidence rating above.
Browse these trials on ClinicalTrials.govClinicalTrials.gov · as of Sep 2026
African mango (Irvingia gabonensis) is a fibrous West African seed traditionally used as a food thickener, now sold as a fat-loss supplement (often as the patented 'IGOB131' extract).
The proposed mechanism mixes soluble-fiber satiety with claimed effects on adipogenesis genes (PPAR-gamma, leptin, adiponectin) demonstrated mostly in vitro. The honest reality: the positive human trials almost all come from a single research group in Cameroon, several with industry funding and methodological flaws.
A 2013 Cochrane-style systematic review (Onakpoya, Ernst) examined the three available RCTs, found them all flawed in reporting, and concluded African mango 'cannot be recommended as a weight loss aid.' There has been essentially no independent replication of the large effect sizes claimed by the original group.
High soluble-fiber content may slow gastric emptying and blunt appetite — a generic fiber effect, not unique to this seed.
In-vitro work claims effects on PPAR-gamma, leptin, and adiponectin pathways; this has not been confirmed to drive the human results.
How African Mango works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
Monitor blood glucose if combining with medication.
Not studied — avoid.
Trials reported reductions in fasting glucose; combined with glucose-lowering drugs this could theoretically increase hypoglycemia risk. Monitor.
As a soluble fiber, it could blunt absorption of co-ingested drugs; separate dosing.
Tip: Reduce dose or discontinue
Tip: Take earlier in the day
Tip: Typical of soluble fiber; take with water
African Mango has an evidence score of 3/10 — emerging evidence based on 6 indexed studies. A West African seed extract marketed aggressively for weight loss. A handful of small, mostly single-laboratory trials (the Ngondi/Oben group in Cameroon) report weight and lipid improvements — but a systematic review found the trials poorly reported and the effect unproven, with no independent replication. Representative study: PMID 23419021.
The commonly studied dose of African Mango is 150 mg IGOB131 extract twice daily before meals (the dose used in the main trial); whole-seed trials used ~1.05 g three times daily. Individual needs vary — start at the lower end of the range and adjust based on how you respond.
The best time to take African Mango is between meals. It can be taken on an empty stomach. Taken 30-60 minutes before lunch and dinner in the trials, consistent with a fiber/satiety rationale.
African Mango is generally safe at recommended doses, with a few precautions worth noting. The most commonly reported side effects are flatulence / GI upset, headache, sleep difficulty. Use caution if any of these apply to you: Pregnancy/breastfeeding (not studied); Caution with diabetes/blood-pressure medication (possible additive effects).
Berberine
Likely helpsActivates AMPK to regulate blood sugar, improve insulin sensitivity, and support lipid metabolism — comparable to metformin in some trials.
Caffeine
Likely helpsBlocks adenosine receptors to boost alertness, reaction time, and endurance — one of the most proven ergogenic aids.
CoQ10
Likely helpsA lipid-soluble antioxidant central to mitochondrial energy production, with the strongest trial support for fertility/IVF outcomes and heart failure.
Red Yeast Rice
Likely helpsFermented rice containing natural statins that effectively lower LDL cholesterol — the original statin.
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Reviewed by Dr. Baher Al Hakim · Last reviewed June 2026 · evidence from 8 studies · how we score · editorial policy
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
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