After metabolic bariatric surgery, adults who follow a structured protein supplement plan that starts at 20 grams per day and increases to 60 grams over 12 weeks, then transitions to dietary sources,...

For adults who have had metabolic bariatric surgery, combining structured resistance training with daily whey protein supplements may help preserve lean body mass during the first three months after surgery, compared to standard post-surgical care.

Taking extra protein shakes after losing weight doesn’t help you keep the weight off any better than eating the normal amount of protein in your daily diet.

For adults who have had weight-loss surgery, adding strength training and extra protein to their routine may lead to better physical function and improved perception of their body image compared to standard post-surgery care.

If older adults with obesity and type 2 diabetes drink a special protein shake with leucine and vitamin D for 3 months, it might help at first—but the benefits don’t last 6 months after stopping, unless they keep eating lots of protein.

If fit people already eat a lot of protein, taking extra casein protein in the morning or before bed doesn’t change their body fat or muscle over 8 weeks—if their workouts stay the same.