Jim, I doubt that eating undenatured compared to denatured whey protein will make any difference.

When any protein food reaches the stomach it will rapidly become denatured, mainly because of the low pH (~ 1,5-3.5) in the stomach and also because a stomach enzyme (pepsin) will rapidly cleave any protein-rich food into small fragments, regardless of whether it enters the stomach in native (not denatured ) or denatured form.