Since the latest research shows that creatine does help strengthen muscles, athletes who take these supplements need to know how much they can take safely before they harm themselves. When you exercise and your muscles get as much oxygen as they need, they burn carbohydrates, fats and protein for energy. When you exercise so intensely that you cannot get all the oxygen you need, your muscles use creatine and ATP. So when you exercise so intensely that you can't get enough oxygen, you can delay fatigue by taking creatine and it allows you to do more work, which makes you stronger.
Taking too much creatine can cause weight gain, increased insulin production and possibly kidney damage. High levels of insulin constrict arteries to cause heart attacks and affect the brain and liver to make you fat. The chemical process of extracting creatine in the laboratory forms toxic contaminants called dicyandiamide and dihydrotriazines, that have to be removed before humans can take them safely. Furthermore, the sarcosine used to make creatine comes from cow tissue that may contain prions that cause mad-cow disease and brain damage. The French government prohibits the sale of products containing creatine.
The body of a 160 pound man contains 120 g of creatine and he takes in and uses around 2 grams a day. Taking in three time that or 6 grams a day may harm him. So let the buyer beware. Creatine allows you to lift more weights and make you stronger, but it comes with a price and may harm you. Large doses of another muscle strengthener, anabolic steroids, have caused liver and heart damage and sudden death in athletes who have taken them.
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