(Independent) - Northumbria University is seeking volunteers to test the effects of consuming resveratrol, which is found in red grapes' skin.

A research team at Northumbria University are examining resveratrol, which is found in red wine, and its effect on blood flow.

The team believes the substance may boost mental function by increasing blood flow to the brain and wants to test the theory with the help of healthy volunteer subjects. 

A study on people aged 18-35 has already been carried out, with some participants demonstrating improved performance when their mental function was tested.

However, positive results have not been consistent. The researchers believe this may be due to studies’ tendency to focus on young healthy populations already at the peak of their mental performance . 

They believe a stronger correlation indicating a more pronounced benefit may be found with older participants. 

The university, based in Newcastle, is now looking for healthy male or female participants aged between 50-70 years to assess the effects of resveratrol. 

Volunteers will also get £30 for their time.