Paul Saladino· MD
at least according to the USDA nutritional database there's a pretty significant loss of spinach with 28.1 milligrams per 100 grams of vitamin C fresh and 9.8 milligrams for 100 grams once it's cooked and I don't have the data about how it's cooking for how long but raw and cooked forms of pork liver had essentially the same amount of vitamin C with 25.3 milligrams for 100 grams and 23.6 milligrams per hundred grams respectively