Promoters of the Paleo or Stone Age diet advise eating no grains of any kind, because that is what our successful ancestors did before they settled and became farmers. 10,000 years isn’t very long in evolutionary terms. If that is a step too far for you just now, consider leaving out just one grain, wheat. It is the grain which causes your blood sugar to spike more than any other. It also contributes to inflammation and glycation, which accelerate the ageing process. So maybe a couple of oat cakes instead of the next slice of toast?