Often in health and longevity discussions, you'll hear arguments about mechanisms. For instance: Antioxidants -> reduced free radicals -> less DNA damage -> less cancer Unfortunately, these biologically plausible-sounding claims usually don't work when rigorously tested. Are mechanistic arguments useless? No. They are a great source of *hypotheses*. While most of these hypotheses fail, some eventually lead to important new treatments. Unfortunately, health gurus, podcast...