Thermogenic and HR monitor

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Does anyone here take a thermogenic and use a heart rate to track their calories?

I definitely notice a difference between taking it and not. On the days when I take it, my heart rate is maintained at a higher level during exercise and I end up burning more calories. I also sweat a lot more. On the days when I forget to take it, my heart rate doesn't get as high doing the same exercise and I end up burning less calories according to my HR monitor. I also sweat less.

Has anyone experienced the same effect?

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