Doses of vitamin B1 (thiamine) can reverse early kidney disease in people with type 2 diabetes, research shows. The team from Warwick University tested the effect of vitamin B1, which is found in meat, yeast and grain, on 40 patients from Pakistan. The treatment stopped the loss of a key protein in the urine, the journal Diabetologia reports. Charity Diabetes UK called the results "very promising" - but said it was too early for any firm conclusions.