Please correct me if I'm wrong, I am not a scientist or physiologist myself so I very well could be. From what I've observed, all the the research on the performance benefits of beets uses indirect measurements of nitric oxide levels.

Just like you discuss with heart rate vs power training - the heart rate is influenced by so many other factors where as power is a direct measurement of effort. They are both important measurements, but one is direct and the other is an indirect measurement. There needs to be other factors considered when using heart rate - similar to saying nitrates are working because they are indirectly measured. Does that make any sense?

I was just trying to point out the differences between Betalains and Nitrates - because they work through completely different pathways in the body!

Thanks for helping refine the message though, its very helpful as we grow!

Eric
eric@sur.co

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