University of Warwick researchers have found that a combination of two compounds found in red grapes and oranges could be used to improve the health of people with diabetes, and reduce cases of obesity and heart disease.
A team led by Paul Thornalley, Professor in Systems Biology at Warwick Medical School, studied two compounds found in fruits but not usually found together. The compounds are trans-resveratrol (tRES) - found in red grapes, and hesperetin (HESP) - found in oranges. When given jointly at pharmaceutical doses the compounds acted in tandem to decrease blood glucose, improve the action of insulin and improve the health of arteries.
Although the same compounds are found naturally in some fruits, the amounts and type required for health improvement cannot be obtained from increased fruit consumption. The compounds that increase Glo1 and are called a 'Glo1 inducer'. Pharmaceutical doses for patients with obesity, diabetes and high risk of heart disease could be given to patients in capsule form.
Thirty-two overweight and obese people within the 18-80 age range who had a BMI between 25-40 took part in the trial. They were given the supplement in capsule form once a day for eight weeks. They were asked to maintain their usual diet and their food intake was monitored via a dietary questionnaire and they were also asked not to alter their daily physical activity.
The team found that the highly overweight subjects who had BMIs of over 27.5 with treatment displayed increased Glo1 activity, decreased glucose levels, improved working of insulin, improved artery function and decreased blood vessel inflammation. There was no effect of placebo.
Prof. Thornalley and his team are now hoping manufacturers will want to explore the use of the compound as pharmaceutical products.
