Humans have stomach acid with a pH of 1.5.
That's more acidic than:

• Wolves (pH 2.0)
• Lions (pH 2.0)
• Dogs (pH 2.0)
• Most obligate carnivores
  Similar to:
• Vultures (pH 1.0-1.5)
• Hyenas (pH 1.5)
• Other scavengers
  Why?
  Because we entered the carnivore guild as scavengers, not apex predators.
  We didn't hunt fresh kills. We stole from predators or found days-old carrion.
  That meat was crawling with bacteria. Partially decomposed. Potentially deadly.
  Our ancestors needed industrial-strength stomach acid to:
• Kill pathogens in rotting meat
• Digest partially degraded protein
• Survive on scavenged carcasses
  The stronger acid = evolutionary adaptation to eating meat that would kill other carnivores.
  Your stomach acid is designed to dissolve bone and kill botulism.
  Not digesting kale.
  We evolved by eating the leftovers from lion or bison kills, just ask the Lakota, Dakota, and Nakota.
  Your biology still expects meat. Preferably fatty. Potentially questionable freshness.
  Which explains ...

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