05 Sep 2018 --- Wholegrains – from rye and oats to wheat – can prevent Type 2 diabetes, particularly when consumption levels are high, according to Danish researchers. Previous studies have flagged wholegrain’s potential in Type 2 diabetes prevention but did not identify the role of different wholegrain sources, as well as the quantities needed to reduce the diabetes risk. The Danish study included 55,000 participants and spanned 15 years.