Taking muscle-building supplements that contain creatine or androstenedione might increase the risk of testicular cancer in men.
In a recent study, researchers found that men who used muscle-building supplements at least once in their life had a 65% increased risk of developing testicular cancer. The link was even stronger for men who started taking these supplements at an early age, had used them for a long period of time, or had tried different types of muscle building supplements.
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