It's entirely possible for someone to mostly survive on a diet of nuts and berries, as these two types of foods can provide most of the nutrients that the body needs to stay healthy. However, you would have to consistently eat a large variety of them and will likely need some form of supplementation.

Is there a single food you can survive on?

However, there is no known food that supplies all the needs of human adults on a long-term basis. Since Taylor is determined to follow a one-food diet, then potatoes are probably as good as anything, as they contain a wider range of amino acids, vitamins and minerals than other starchy foods, such as pasta or rice.

What 3 foods Can you survive on?