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This is why the tyrosine plus theanine pairing is so common, especially alongside caffeine, because it can feel more controlled and less jittery than caffeine alone
The company hasnt done any clinical testing on this aspect, but its research was done on consumers with metabolic syndrome, and it did showcase improvements in things like constipation, diarrhoea and nausea
doi: 10.1002/mds.25945 81 KouliATorsneyKMKuanW-L
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