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Randomized trial · measured lab tests or safety

One dose of berberine in mice and 15 healthy men raised insulin release

Zhao and colleagues · Nature communications · 2021

Original title: Berberine is an insulin secretagogue targeting the KCNH6 potassium channel.

Under review. A person has not yet checked this summary against the paper. It is written from the PubMed abstract. Until a person checks it, search engines are asked not to list this page.

What the study found

Points to benefit

In mice, berberine raised insulin release and lowered blood sugar. In 15 healthy men, berberine raised insulin release when blood sugar was high but not at baseline.

The study at a glance

Type of study
Randomized trial
Who or what was studied
15 people · Mice with high blood sugar, plus 15 healthy men in a single-dose trial
What was tested
One dose of berberine vs placebo, with a 160-minute high blood sugar clamp test
What it measured
Lab tests or markers
Trial registration
NCT03972215
Who has a stake
No stake declared
No competing interests declared.
Journal
Nature communications, 2021
Source
PubMed record 34556670. This page is based on the abstract only.

How much this study counts

  • ✓Randomized: people were put into groups by chance, so the groups start out alike.
  • ✓Compared with a placebo, a dummy treatment.
  • –Small: 15 people. Small trials can miss real effects or find chance ones.
  • –Measured lab tests or markers, which stand in for body weight and blood sugar. A better marker does not always mean better health.
  • ✓No competing interests declared.
  • •Summarized from the PubMed abstract only. The full paper may hold details the abstract leaves out.

✓ Strength– Limit• Note

These points come from fixed rules about the type of study, its size and length, what it measured, and who has a stake. Every study on Digestery gets the same rules.

Where this study sits

Each dot is one on-topic paper on this question. Steps near the top answer the question more directly.

↑ Stronger evidence

  1. Trials in people: weight and blood sugar

    7

    7 benefit

  2. Trials in people: other measures

    7

    5 benefit, 1 mixed, 1 no difference

  3. Trials in people: lab tests or safety

    2

    1 benefit, 1 no difference

    ↑ This study is the ringed dot

  4. Population studies

    2

    2 benefit

  5. Blood levels and genes

    0

    None among the papers we read.

  6. Animals

    1

    1 benefit

↓ Weaker evidence

  • Points to benefit
  • Mixed
  • No difference
  • No direction
  • Points to harm

How it fits with the other research

The short answer to “Does berberine help with weight loss and blood sugar?”

Lowers blood sugar in diabetes; weight unclear.

Confidence: low. Based on 28 on-topic papers.

Read the full answer

Few other papers sit on the same step, so there is little to compare it with.

  • Open item for a person: Zhao 2021 is set to rct, but its human part is a one-dose insulin test in 15 healthy men.

Other papers on the same step

See all 28 studies on this question

How this page was made

Label

First read of the abstract
Claude Sonnet
Independent second read
Claude Haiku
Differences settled
The reviewer corrected 2 fields after reading the abstract. Claude Opus 5.5.
Headline
Claude Sonnet, from the checked study record. A script checked its numbers and wording.
Numbers
Checked against the abstract by a script
“How much this study counts”
Fixed rules, the same for every study
Source check by a person
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