Humans really need fats or carbohydrates as fuel, protein as kind of the building block and in order to create the ideal bio-chemistry, the ideal chemical engine in a human, you want to have fat or carbohydrate, I’d argue that fat is a superior source of fuel, then with protein as building blocks and then all the nutrients you need to fill in the gaps to make all the bio-mechanical wheels and levers turn. And you get those nutrients from the other parts of the animal in conjunction with the muscle meat.
Muscle meat certainly has many micro-nutrients. If you look at the micro-nutrient profile of muscle meat and compare it with something like liver, they are sort of beautifully complimentary. You can look at zinc and copper for instance, or folate and other B vitamins that occur in the muscle meat like B6.
What this illustrates here is there’s a lot of zinc in muscle meat, there’s a lot of copper in liver, there’s a lot of folate in liver and there’s a lot of B6 in muscle meat, so if you’re looking at B vitamins or minerals, combining the organs of an animal with the muscle meat gives you this more robust, complete compliment of micro-nutrients to make your biochemistry work.
Saladino, Paul, guest. “Part 47 – The Great Meat Debate w/ Mark Sisson, Dr. Paul Saladino, & Dr. Shawn Baker” Peak Human, 18 July 2019. https://www.peak-human.com/home/the-great-meat-debate-with-mark-sisson-dr-paul-saladino-and-dr-shawn-baker