Eating a wide variety of foods is a key principle in nutrition. It’s so important that the official government guidelines on healthy eating state ‘Eat a wide variety of nutritious foods’ as their first guideline, ahead of guidelines that we limit saturated fat, choose foods low in salt, limit your alcohol and prevent weight gain.
I can't stress how much variety matters. Think swings and roundabouts! Study after study shows that those of us who eat a wide variety are in better health and live longer than those who don’t.