Muscle & Workout Supplements (Creatine and BCAAs)
Do supplements with leucine (a branched-chain amino acid or BCAA) prevent muscle loss when muscles are immobilized (such as in a leg brace)? See what a recent study showed in the What It Does section of our Muscle & Workout Supplements Review.
Glutamine, an amino acid, plays a role in maintaining the digestive tract. Can taking it as a supplement help people with irritable bowel syndrome (IBS)? Find out what a recent study showed in the Glutamine section of the Muscle Enhancers Review.
Giving creatine during a resistance-training program significantly boosted muscle size more than placebo in a recent study — and certain muscles increased in size more than others. Learn more in the "What It Does" section of the Muscle & Workout Supplements Review (Creatine & BCAAs). (Also see our Top Picks and Cautions and Concerns for creatine).
A recent study found that active, middle-aged people restricted to bed rest for several days lost significantly less muscle mass and function if given a leucine supplement along with their meals. Fat gain was also reduced. Get the details, including our tests of leucine-containing supplements, in the Muscle Enhancers Review >>
A study of men who have used muscle-building supplements shows a disturbing increase in the risk of testicular cancer. More information is in the Muscle Enhancers (Creatine and Branched-chain Amino Acids) Review >>
Taking creatine daily for at least five years did not slow the progression of Parkinson disease according to a recently reported study involving nearly 1,000 patients. For more details about the study, other studies with creatine (for strength, fibromyalgia, etc.), and our tests of creatine supplements, see the Product Review of Muscle Enhancers (Creatine and Branched-chain Amino Acids) >>
A study of men and women receiving knee replacement surgery showed that taking essential amino acids (including branched-chain amino acids) twice daily before and after surgery reduced muscle loss and speeded recovery. For details, including dosage, plus our reviews of amino acid supplements, see the updated Muscle Enhancers Review >>
A new study shows that creatine might have a role in boosting muscle strength in patients with fibromyalgia. Get the details, plus quality ratings for creatine supplements in our updated Muscle Enhancers (Creatine and Branched Chain Amino Acids) Review >>