Jamun and blood sugar
What 4 graded rows on jamun agree on for blood sugar, and where they differ. Counted side by side, never averaged.
Consensus finder Rows from the Jamun page, reviewed Oct 21, 2026 How it decides
What the rows agree on
Each block and row is one graded row from the Jamun page, with its PubMed record.
Your question
Jamun and blood sugar
4 rows · 893 peopleSplit. 1 row found an improvement, 2 found no difference and 1 had mixed results.
- CGrade C× 1
- DGrade D× 3
- Rows
- 4
- Trials
- 16
- People
- 893
- Pooled reviews may count some twice
Where they differ
From the rowsThe best-graded row, grade C, is a meta-analysis of 776 people (2026) and reported mixed results.
The row that found an improvement was larger: 60 people, against a median of 29 people for the 2 rows that found no difference.
Only the row that found an improvement names men in its population.
1 row with mixed results is left out of this comparison.
The rows
1 improved · 2 no difference · 1 mixed- DGrade DGlucose tolerance in healthy volunteers · No difference
RCT · n 30 · 2000 · Non-diabetic young volunteers in Porto Alegre, Brazil
Leaf tea (preparation in the paper) · Before a glucose tolerance test
Jamun leaf tea had no antihyperglycemic effect on the glucose tolerance test.
- DGrade DFasting blood glucose in type 2 diabetes · No difference
RCT · n 27 · 2006 · Brazilian adults with type 2 diabetes
Leaf tea daily (preparation in the paper) · 28 days
Fasting glucose fell with glyburide but did not change with jamun tea or placebo; lipids, kidney and liver markers did not differ between groups.
- DGrade DBlood glucose in type 2 diabetes (herb blend) · Improved
Open-label trial · n 60 · 2005 · Indian men with non-insulin-dependent diabetes
1 g a day for 6 weeks, then 2 g a day · 3 months
Fasting and post-meal glucose fell from baseline, and fewer men needed oral diabetes drugs.
- CGrade CGlycemic control in type 2 diabetes or prediabetes · Mixed
Meta-analysis, 13 studies · n 776 · 2026 · Adults with type 2 diabetes or prediabetes in 13 RCTs
Various plant parts and formulations · Mostly short trials
Fasting glucose fell by 14.4 mg/dL (95% CI -23.1 to -5.7), but post-meal glucose and HbA1c did not change significantly; heterogeneity was extreme (I2 about 98-99%).