A meta-analysis reveals that fruit consumption significantly decreases fasting blood glucose in diabetes patients but does not show a significant difference in glycosylated hemoglobin (HbA1c) levels.
The systematic meta-analysis evaluated nineteen randomized controlled trials (RCTs) with 888 participants to discern the impact of fruit consumption on glucose control in individuals with diabetes mellitus. The study was thorough, following the PRISMA protocol and assessing inclusion based on strict criteria. The data synthesis utilized RevMan 5.4 software and assessed heterogeneity through the I2 value, using mean difference (MD) and 95% confidence interval (CI) for outcome measures.
Fruit consumption led to a significant reduction in fasting blood glucose levels (MD -8.38, 95% CI -12.34 to -4.43), suggesting possible benefits in managing short-term glucose control for those with diabetes. However, it showed no notable effect on the HbA1c levels (MD -0.17), a marker of long-term glycemic control. Subgroup analysis indicated that both fresh and dried fruit contributed to decreased fasting glucose levels.
The findings support the inclusion of fruit in the diet of individuals with diabetes, provided overall energy intake remains constant. Contrary to the traditional view that fruit intake might exacerbate diabetes due to sugar content, this analysis suggests that moderate fruit consumption is beneficial for managing fasting blood glucose. However, as the study found high heterogeneity in results for HbA1c, the long-term impact of fruit consumption on diabetes control requires further high-quality research.