A high-protein diet might benefit people with type 2 diabetes, but it may depend on whether or not they possess a particular gene related to vitamin D metabolism. In a new study, individuals with a particular gene variant that boosts blood levels of vitamin D experienced greater reductions in insulin levels and improved insulin sensitivity when they ate a higher-protein diet. The researchers note this information is not practically useful at present time since people do not know the genetics behind their personal vitamin D metabolism but it may be helpful in the future as genetic profiling becomes a more common aspect of healthcare.
Diabetologia, September 2015