Eating only animal foods might reduce body-wide inflammation, keep blood sugar steady, and give you lots of important nutrients—all of which could help your metabolism work better.

Eating only animal products might help calm inflammation in your body by lowering high triglycerides, which could mean your metabolism is under less stress.

Eating only animal products might help balance your hunger hormones so you naturally eat less and lose body fat, especially if you're overweight.

Eating only animal products might help calm inflammation in autoimmune diseases by cutting out certain plant foods that could be setting off the immune system — but we don't have solid proof yet.

Eating only meat long-term might hurt your heart, mess with your metabolism, and weaken your gut and immune system because it lacks fiber and key nutrients found in plants.

Some people with autoimmune diseases say they feel better when they eat only animal foods and cut out all plants—this might help because it reduces things in food that could trigger symptoms or cause inflammation, but it doesn’t work for everyone.