Word: proteins
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...healthy and the pregnancy normal. But as soon as her baby was born, doctors were struck by the infant's extraordinary muscularity. By 7 months, he had a bodybuilder's pumped-up proportions. Researchers determined that the baby had a double dose of a mutation that inactivates a protein that restrains muscle development (a mutation also seen in mice and cattle). While scientists hope that pinpointing the mutation will help them learn how to reverse muscle wasting from disease, they also know that someday somebody will try to parlay it into a performance-enhancing drug. --By David Bjerklie
...carb. You can eat fewer calories by eating less food--which is why you can lose weight on any diet that restricts entire categories of foods or limits portion sizes--but you may get hungry and gain it back. Fat has 9 calories per gram, but protein and carbohydrates have only 4 calories per gram, so when you eat less fat, you consume fewer calories without having to eat less food. So eat less fat and fewer simple carbs...
...well after a workout may be more than just a matter of convenience. "There are great physiological benefits to eating within the first half an hour after you've exercised," says Amy Lanou, nutrition director for the Physicians Committee for Responsible Medicine. "You're replenishing your water, carbohydrates and protein right when that's most essential...
WHAT YOU DO Follow the 40-30-30 rule: 40% of calories come from carbs, 30% each from protein and fat. How much you eat depends on lean body mass and exercise...
...CLAIM The correct carbs-protein-fat ratio will keep you trim and control hormones that fend off disease...