3 ms·

Because they are not in their natural death age range yet, and because of the huge amount of confounding variables.

• nabla9 6y ago
  It's possible to use life span as a biomarker and not to follow the whole natural life cycle (when you know know the natural rate of death in all age-groups, deviations from it give information that allows to extrapolate). Unfortunately it's near impossible for humans because we don't live in controlled environment and expected lifespan changes. Additionally bodybuilders and athletes have food, drug and lifestyle that is very different from others.
  • ben_w 6y ago
    I can understand the value of controlling for confounding variables for small-scale tests, and I can totally accept that bodybuilders may be a specific abnormal group different from the general population, but surely the one thing we don’t have to care about in this particular case is a controlled environment, because we would want it to work in general and on almost everyone?
    • victorbstan 6y ago
      They also take a lot of other supplements. So you can’t narrow it down to anything.