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Open WellbeingWhat the studies actually measured

Cholesterol and blood fats

Berberineand HDL cholesterol

Three sources here, and they say different things: two measured higher HDL cholesterol and one found no clear difference.

How sure anyone can be

Moderate certainty, level 3 of 4

Further research may change this.

The most certain of the three findings here; each record carries its own.

The numbers reported

One source’s range, drawn against its own line of no difference and scaled to its own numbers.

00.06 mmol/L0.11

This range crosses the no-difference line, so these numbers fit a real difference and no difference at all equally well.

Bar the confidence interval — the range the true effect is likely to sit inNotch the number the source reportedLine where there would be no difference at all

Three sources, newest first

We do not pick between these or average them into one number.

What we read is the published abstract, not the full paper, so a blank below may still be printed in the paper itself. A fixed rule worked this out from the source’s own fields. Nobody checked this rating by hand.

  • Systematic review, 2025

    Moderate certainty, level 3 of 4

    Efficacy and safety of berberine on the components of metabolic syndrome: a systematic review and meta-analysis of randomized placebo-controlled trials.

    Front Pharmacol. 2025;16:1572197. doi:10.3389/fphar.2025.1572197. PMID:40740996.

    Number reported
    Not in the abstract
    Which way it went
    No clear difference
    Likely range
    Not in the abstract
    Source’s own words
    mmol/L HDL cholesterol, weighted mean difference vs placebo (magnitude not reported)
    Who was studied
    Adult with metabolic syndrome
    Compared with
    placebo
    Amount taken
    Not in the abstract
    For how long
    Not in the abstract
    Disagreement between studies
    Not in the abstract
    Kind of record
    Journal article
    How this rating was reachedstarts at High, one step down: imprecision
    1. Starts at High
    2. Imprecision brought it down to Moderatethe abstract reports no confidence interval for the estimateNot in the abstract
    3. Ends at ModerateOne step down.
    Checked, nothing to step it down for
    risk of bias and indirectness
    Inconsistency
    No disagreement reported, and no count of studies behind it

    Imprecision stops at the first check that applies; others may apply too.

    AI-reviewed & signed — an AI agent re-read this finding against the saved source and checked that the quote, the numbers, the units and the direction match it. No person read it. The owner authorised the agent to sign the batch with the owner's key, and every build rechecks that signature against these exact bytes.

    Read the abstract on PubMed

  • Systematic review, 2023 · 15 studies pooled · 1,471 participants

    Moderate certainty, level 3 of 4

    Overall and Sex-Specific Effect of Berberine for the Treatment of Dyslipidemia in Adults: A Systematic Review and Meta-Analysis of Randomized Placebo-Controlled Trials.

    Drugs. 2023;83(5):403-427. doi:10.1007/s40265-023-01841-4. PMID:36941490.

    Number reported
    0.06 mmol/L
    Which way it went
    Higher
    Likely range
    0 to 0.11
    Source’s own words
    mmol/L HDL cholesterol, mean difference vs placebo
    Who was studied
    Adult with dyslipidemia
    Compared with
    placebo
    Amount taken
    900 to 1,500 mg/day berberine (dose range from the record's plain-language summary)
    For how long
    28 to 168 days
    Disagreement between studies
    Not in the abstract
    Kind of record
    Journal article
    How this rating was reachedstarts at High, one step down: imprecision
    1. Starts at High
    2. Imprecision brought it down to Moderatethe confidence interval includes no effectReported in the abstract
    3. Ends at ModerateOne step down.
    Checked, nothing to step it down for
    risk of bias and indirectness
    Inconsistency
    No high disagreement reported between the 15 studies it pooled

    Imprecision stops at the first check that applies; others may apply too.

    AI-reviewed & signed — an AI agent re-read this finding against the saved source and checked that the quote, the numbers, the units and the direction match it. No person read it. The owner authorised the agent to sign the batch with the owner's key, and every build rechecks that signature against these exact bytes.

    Read the abstract on PubMed

  • Systematic review, 2013

    Moderate certainty, level 3 of 4

    The effects of berberine on blood lipids: a systemic review and meta-analysis of randomized controlled trials.

    Planta Med. 2013;79(6):437-46. doi:10.1055/s-0032-1328321. PMID:23512497.

    Number reported
    0.05 mmol/L
    Which way it went
    Higher
    Likely range
    0.02 to 0.09
    Source’s own words
    mmol/L HDL cholesterol, mean difference vs control
    Who was studied
    Adult
    Compared with
    control (comparator not detailed in the abstract)
    Amount taken
    Not in the abstract
    For how long
    Not in the abstract
    Disagreement between studies
    Not in the abstract
    Kind of record
    Journal article
    How this rating was reachedstarts at High, one step down: imprecision
    1. Starts at High
    2. Imprecision brought it down to Moderatethe abstract does not state how many participants were pooledNot in the abstract
    3. Ends at ModerateOne step down.
    Checked, nothing to step it down for
    risk of bias and indirectness
    Inconsistency
    No disagreement reported, and no count of studies behind it

    Imprecision stops at the first check that applies; others may apply too.

    AI-reviewed & signed — an AI agent re-read this finding against the saved source and checked that the quote, the numbers, the units and the direction match it. No person read it. The owner authorised the agent to sign the batch with the owner's key, and every build rechecks that signature against these exact bytes.

    Read the abstract on PubMed

What is still missing from these readings

  • One give no number at all, only which way it went.
  • One gives no likely range, so how precise that number is is unknown.
  • Two do not say how many people took part.
  • Amount taken — Two of Three readings: Not in the abstract.
  • For how long — Two of Three readings: Not in the abstract.

Something nobody wrote down is never a zero and never a guess.

Still to read for Berberine

Five of the 14 things on our list for Berberine have no reading here yet:

  • Diastolic blood pressure
  • Interleukin-6
  • Sex hormone binding globulin
  • Systolic blood pressure
  • Total testosterone

Still to read means nobody here has got to it, not that it was tried and did nothing or that no research exists. A pairing on no list is not a gap: we never set out to read it.

Read next

This is a library, not advice. No recommendation, no dose, no diagnosis, no ranking. We never ask about your symptoms, and nothing here is tailored to you.