| Effect | Increase |
| Trial Design | Cohort |
| Trial Length | 1-6 months |
| Number of Subjects | 53 |
| Gender | Both Genders |
| Age Range | 45-64 |
| Body Types | Overweight |
Improvements in lipoproteins and triglycerides were noted in type II diabetic persons drinking tea made from Roselle twice a day for a period of one month
| Effect | None |
| Trial Design | Double blind |
| Trial Length | 1-6 months |
| Number of Subjects | 60 |
| Gender | Both Genders |
| Age Range | 30-44, 45-64 |
| Body Types | Average |
In hypercholesterolemic subjects given a hydroalcoholic leaf extract, 90 days of supplementation failed to improve any measured serum parameter
| Effect | Increase |
| Trial Design | Cohort |
| Trial Length | 1-6 months |
| Number of Subjects | 94 |
| Gender | Both Genders |
| Age Range | 45-64 |
| Body Types | Obese |
No control group, but relative to baseline 100mg of a 19% anthocyanin extract was able to reduce various measured parameters over 31 days in persons with metabolic syndrome