If he believes in the benefits of ketosis, then I should definitely look a little closer. Your healthy chef-prepared meals arrive ready to heat, eat and enjoy. Vegetarians and vegans going keto could use tofu as a source of protein, but if you don’t have those restrictions, stick to meat, seafood, and eggs. (So sorry.) Although peanuts are high in fat, they’re also technically legumes and higher in carbohydrates than other nuts.