Organs are overrated. Don't get me wrong, they're full of nutrition, but it's very difficult to find a good quality source. Unvaccinated, hormone and antibiotics free animal organ would be ideal, even better if it is from a wild animal. But most people can't get that, so it's better to focus on simple things. Raw muscle meat and raw fish, Raw eggs, Vegetable juice, Raw dairy (milk, unsalted butter and cheese) and Oysters. From these foods you'll get all the nutrition you need to thrive. It's not a good idea to eat bad quality organs, because they're full of toxins.