It won't make you ride like Lance, but it might help you recover like Lance.

I don't know about raising lactate thresholds or lowered HR, but in my experience, Endurox R4 is good stuff. It makes a difference in my energy level after strenuous rides, as well recovery rate. Some people claim reduced soreness, but I rarely have soreness so can't comment on that. I'm typically pretty skeptical of claims made by companys for their products, and don't often notice results, but on a friends insistance I tried it and became a believer.

It's useful only as a recovery drink. In spite of their claims, don't try to use it half strength as a ride beverage. A friend tried it and suffered stomach cramps... it's too hard to digest for use during rides.

It seems pricey, but Performance puts it on sale all the time, and if you do the math, it isn't that expensive per serving.

I don't work for Performance or Endurox, just a happy customer.