Adding protein shakes to strength training doesn’t make people with fatty liver disease any stronger or more enduring than just doing the workouts alone — even when they’re eating less food.

When people with fatty liver disease eat a lot of protein and lift weights at the same time while eating very little, they don’t get any extra muscle benefits — the two things don’t work together like they usually do.

People with fatty liver disease on a low-calorie diet don’t lose muscle if they eat at least 0.8 grams of protein per kilogram of body weight each day — eating more protein doesn’t help any more.

People with fatty liver disease who do strength training five times a week for a month get stronger and can do more reps without getting tired, even if they’re eating less food.

When people with fatty liver disease do strength training for a month while eating less, they get stronger not because their muscles grow bigger, but because their brain and nerves learn to use the muscles better.

Older women around 69 years old who drink a whey protein shake every day and lift weights three times a week for three months may gain more muscle, lose belly fat, and improve their overall metabolic health more than those who just do the workouts without the protein.