At what age is it safe to take clenbuterol for athletic enhancement? I have read that clenbuterol has been shown in rat studies to increase cardiac muscle mass. Is this a concern for humans? If so, are their any drugs (such as atenolol) that could inhibit this side effect? I have also heard that, because clenbuterol increases cortisol levels, it should never be taken without anabolics. If this is true, would a small amount of anavar taken concurrently with clenbuterol be both safe and effective in terms of cortisol management?

Thank you for any advice.

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