I was wondering why this does not contain histidine? Thank you!

Histidine is not truly essential. When you take PerfectAminoXP, the histidine level in your blood will rise within an hour. The absolute genius of PerfectAminoXP is that when you have the eight truly essential amino acids, all the others can be synthesized as needed. It is also worth noting that arginine, which is occasionally touted as an "essential" amino acid by some, can also be synthesized so long as you have the right balance of the eight EAAs. When you take PerfectAminoXP, your body has all it needs to make all body proteins.

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