"More recent animal studies—again using far higher doses than would ever be ingested by humans—showed that clenbuterol decreases endurance by degrading the heart structure. Indeed, some of the research animals died from heart failure. A recent study that examined the heart and skeletal muscles of rats given clenbuterol identified direct toxic effects from the drug.1 What’s particularly interesting about that study is that the bad effects resulted from just a single dose of injectable clenbuterol—a form favored by some bodybuilders and other athletes.
The results showed that clenbuterol didn’t just harm heart-muscle cells but actually killed them. Heart-muscle-cell loss led to increased collagen deposition. In effect, active heart cells were replaced by scar tissue, setting the stage for sudden heart failure.
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Co o tym sadzicie i jakie jest wasze zdanie na temat bezpieczenstwa clenbuterolu .