Non-soy legume consumption lowers cholesterol levels: a meta-analysis of randomized controlled trials.
Study Goal
The researchers aimed to determine the effects of non-soy legume consumption (such as beans, peas, and seeds) on blood lipid levels, specifically total and LDL cholesterol.
Results Summary
The meta-analysis found that a diet rich in non-soy legumes significantly reduced total cholesterol by -11.8 mg/dL and LDL cholesterol by -8.0 mg/dL compared to control diets. The results suggest that non-soy legumes can effectively lower cholesterol levels.
Population
268 participants from 10 randomized clinical trials (specific demographics not detailed in the abstract).
Effective Dosage
Not specified (dietary intervention, not quantified).
Duration
Minimum of 3 weeks per trial.
Interactions
None mentioned.
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
non-soy legume consumption | decrease | total cholesterol | participants | -11.8 mg/dL | decreases | #1 |
non-soy legume consumption | decrease | low-density lipoprotein cholesterol | participants | -8.0 mg/dL | decreases | #2 |
a diet rich in legumes other than soy | decrease | total cholesterol | - | - | decreases | #3 |
a diet rich in legumes other than soy | decrease | LDL cholesterol | - | - | decreases | #4 |
BACKGROUND AND AIMS: Studies evaluating the effect of legume consumption on cholesterol have focused on soybeans, however non-soy legumes, such as a variety of beans, peas, and some seeds, are commonly consumed in Western countries. We conducted a meta-analysis of randomized controlled trials evaluating the effects of non-soy legume consumption on blood lipids. METHODS AND RESULTS: Studies were retrieved by searching MEDLINE (from January 1966 through July 2009), EMBASE (from January 1980 to July 2009), and the Cochrane Collaboration's Central Register of Controlled Clinical Trials using the following terms as medical subject headings and keywords: fabaceae not soybeans not isoflavones and diet or dietary fiber and cholesterol or hypercholesterolemia or triglycerides or cardiovascular diseases. Bibliographies of all retrieved articles were also searched. From 140 relevant reports, 10 randomized clinical trials were selected which compared a non-soy legume diet to control, had a minimum duration of 3 weeks, and reported blood lipid changes during intervention and control. Data on sample size, participant characteristics, study design, intervention methods, duration, and treatment results were independently abstracted by 2 investigators using a standardized protocol. Data from 10 trials representing 268 participants were examined using a random-effects model. Pooled mean net change in total cholesterol for those treated with a legume diet compared to control was -11.8 mg/dL (95% confidence interval [CI], -16.1 to -7.5); mean net change in low-density lipoprotein cholesterol was -8.0mg/dL (95% CI, -11.4 to -4.6). CONCLUSION: These results indicate that a diet rich in legumes other than soy decreases total and LDL cholesterol.