Benefits
Antioxidant Activity in Lab Assays, Blood Markers Only in People
Mangiferin scavenges reactive oxygen species and binds metal ions in test-tube assays. The human antioxidant data comes from a different material, mango stem bark extract. In adults over 65, 900 mg a day for 60 days raised serum total antioxidant status and extracellular superoxide dismutase and lowered lipid peroxidation markers, but that study had no placebo group. A separate six month placebo-controlled Cuban study of the same bark extract, in 68 patients with HIV, also reported better blood redox measures. Both measured blood markers rather than any health outcome, and neither tested isolated mangiferin.
Mango Stem Bark Extract Has Been Studied for Joint Comfort
Two small Cuban studies added 900 mg a day of mango stem bark extract to the usual care of patients with joint disease. In a 120 day placebo-controlled pilot in knee osteoarthritis (38 patients analysed), daily pain scores, WOMAC pain and function scores and ultrasound signs of joint swelling improved more than with placebo. In a 180 day pilot in 20 rheumatoid arthritis patients already taking methotrexate, the extract group improved from its own baseline but there was no difference between the two groups. This is research in diagnosed patients on medical treatment, it used bark extract rather than isolated mangiferin, and it is not a reason to expect relief from a mangiferin supplement.
One Dose of Mango Leaf Extract Improved Attention and Memory Accuracy
One 300 mg dose of a standardized mango leaf extract (Zynamite, over 60% mangiferin) improved accuracy on attention and memory tasks over the following five hours in 70 healthy adults, in a crossover trial funded by the extract's maker. Mood scores did not change. Every cognitive result on this compound comes from single doses of that leaf extract; no trial has tested daily use over weeks, and none has tested isolated mangiferin for cognition.
Exercise Trials Used Mangiferin Combined With Other Polyphenols
The exercise studies did not test mangiferin on its own. In 57 runners, 140 mg of mango leaf extract taken with 140 mg of quercetin before and after a 10 km race plus 100 drop jumps reduced muscle pain and loss of jump height at 24 hours, although race times were the same in both groups. In 12 active men, mango leaf extract combined with peanut husk luteolin improved sprint performance. Both of those trials were part funded by the extract's maker. An independent trial in Denmark gave 14 trained cyclists mangiferin with quercetin through four hours of cycling and found no effect on sprint power or time trial performance.
One Trial Lowered Triglycerides in Adults With High Blood Lipids
In the one randomized trial of isolated mangiferin, 97 overweight adults with high blood lipids took 150 mg a day or placebo for 12 weeks. Triglycerides, free fatty acids and the insulin-resistance index fell and HDL cholesterol rose in the mangiferin group compared with placebo. Total cholesterol, LDL cholesterol, fasting glucose and insulin were unchanged, so this is a triglyceride finding and not a blood-sugar one. It is a single 12 week study from one centre in China and has not been repeated.
Mechanism of action
Reactive Oxygen Species Scavenging
In laboratory assays, mangiferin's polyhydroxylated xanthone structure scavenges hydroxyl, peroxyl and superoxide radicals and chelates redox-active metals such as iron, reducing Fenton-type generation of reactive species. This is test-tube chemistry and has not been shown to translate into a measured health outcome in people.
NF-kB Pathway Modulation
Mangiferin has been shown to inhibit activation of NF-kB and downstream pro-inflammatory mediators including TNF-alpha, IL-6, and COX-2 in cell and animal models, helping support balanced inflammatory signaling.
AMPK & Metabolic Signaling
Mangiferin appears to activate AMP-activated protein kinase in metabolic tissues, supporting glucose uptake and fatty acid oxidation in preclinical models, with potential implications for healthy metabolic regulation.
Mitochondrial & Neuroprotective Effects
By limiting mitochondrial reactive oxygen species and modulating apoptosis-related proteins, mangiferin has demonstrated neuroprotective activity in models of neuronal and cerebral injury, supporting its broader cytoprotective profile.
Clinical trials
Randomized, double-blind, placebo-controlled crossover trial of a single dose; funded by the extract's manufacturer (Nektium Pharma)
70 healthy adults aged 18 to 45
A single 300 mg dose of mango leaf extract standardized to over 60% mangiferin improved accuracy across the test battery, with specific gains on an attention accuracy factor and an episodic memory factor, at 30 minutes, 3 hours and 5 hours after dosing. Mood scores were unchanged. This tested one dose of a branded leaf extract, not isolated mangiferin, and says nothing about taking it daily.
Placebo-controlled pilot study, 120 days, published in a journal not indexed in MEDLINE (J Pharm Pharmacogn Res 2022;10(2):239-252, doi 10.56499/jppres21.1156_10.2.239)
50 patients with painful knee osteoarthritis already on conventional treatment; 38 analysed (21 extract, 17 placebo)
900 mg a day of mango stem bark extract added to usual care reduced average daily pain scores from two weeks onward, improved WOMAC pain and function sub-scores, and reduced the number of joints with ultrasound synovial thickening and effusion, compared with placebo. No adverse effects were reported. The authors are the group that developed the extract, the analysed sample was 38 people, and the trial used bark extract rather than isolated mangiferin.
Double-blind randomized placebo-controlled trial, 12 weeks (Sci Rep 2015, PMID 25989216)
97 overweight adults with hyperlipidemia in China who completed the trial
150 mg a day of mangiferin lowered serum triglycerides, free fatty acids and the insulin-resistance index and raised HDL cholesterol compared with placebo. Total cholesterol, LDL cholesterol, fasting glucose and insulin did not differ between the groups. This is the only randomized trial of isolated mangiferin, it ran at a single centre and it has not been replicated.