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Normal testosterone levels in men vary from about 250 – 800 ng/dl. Anyone testing significantly higher than this is probably taking drugs. But the NFL doesn’t test for total testosterone. They test the ratio between testosterone and epitestosterone. In most people, the ratio is about 1:1. The old NFL standards allowed a player to have up to 10:1 before a test was deemed a presumptive violation. They have recently tightened their standards to 4:1. Even so, it’s easy to manipulate this ratio by taking extra epitestosterone. And the NFL doesn’t recognize elevated epitestosterone levels unless they are above 300 ng/ml – about 37 times the normal maximum. I know this seems like a lot of math, but the bottom line is that a player could have 37 x 4 = 148 times the normal testosterone level before they fail the test.



















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