Conclusion: Tree nut intake lowers total cholesterol, LDL cholesterol, ApoB, and triglycerides. The major determinant of cholesterol lowering appears to be nut dose rather than nut type. Our findings also highlight the need for investigation of possible stronger effects at high nut doses and among diabetic populations.
PubMed 26561616 ↗Brazil Nuts
People mainly take Brazil Nuts for mood, energy, libido. Based on 11 first-hand reports and 10 meta-analyses & systematic reviews in the medical literature. Ranked #852 of 1,974 overall.
Of reports that state an outcome, 100% are positive.
What Brazil Nuts does, according to users
Of the people who reported each effect, the share who said it got better.
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: In addition, a 5-g/d increase in total nut intake was associated with a 4% lower risk of cancer mortality. In conclusion, our findings support the protective association between total nut and tree nut intake and the risk of cancer and its mortality.
PubMed 33307550 ↗Conclusion: Nut supplementation did not change lipid and inflammatory profiles in the secondary cardiovascular prevention setting.
PubMed 38967674 ↗Conclusion: In summary, the available evidence indicates that nuts have modest effect on gut health, but the substantial heterogeneity between studies may hinder further conclusions. This trial was registered at PROSPERO as CRD42023451282.
PubMed 40518048 ↗Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
Reported side effects
How often each side effect came up across all reports.
What users say
Verbatim quotes, shortened only — each links to the original discussion.
“Well they're not always reliably a substantial source. Depending on where they're grown, some will have quite low amounts and some high”
“Brazil nuts - selenium”
“Three Brazil nuts every few days is usually enough selenium.”
“6 brazil nuts-Mostly for selenium and fat”
“In short: Brazil Nuts and Cod Liver Oil. Also try healthy fat like coconut oil etc.”
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Other options for mood
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate