Low levels of chronic metabolic acidosis is a common phenomenon in the Western world. Most people that eat the standard American diet are in a state of chronic acidosis and are not aware of it.
A typical representation of Neanderthals pictures them as killing the woolly mammoth. However a dental plaque tells a different story about the Neanderthal diet
Combining some amount of foraged meat to the predominantly vegan diet did not become a pivotal force in the emergence of human intelligence and brain size.
Humans evolved for 50 million years from plant-eating mammals. Hunting is not natural hominin activity. The Paleo diet only existed for the last 200,000 years.