Comparing The Effects Of Synthetic, Guayusa-extracted, And Green-coffee-extracted Caffeine

Dan W

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Jan 22, 2013
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The guayusa leaf extract stimulated a significantly lower increase in epinephrine compared with [synthetic caffeine]... while the green coffee extract provoked an increase in epinephrine similar to the [synthetic caffeine]...
PubMed / Full text

There were no statistically significant differences in blood pressure, heart rate, or several neurotransmitters.
 

Aleeri

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Jan 14, 2018
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The problem is that Guayusa contains EGCG etc that makes it not peat friendly.
 

BearWithMe

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May 19, 2017
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Synthetic caffeine makes me feel very different than caffeine extracted from coffee beans.

I'm wondering why the researchers did not measured cortisol. That would be really interesting...
 

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