Are we poisonous by nature?

Humans are considered very decent and non-violent people. At least we love to believe so.

For long I have known this as a fact that if we don't consume salt for a long period our body become poisonous. This suggests that we are poisonous otherwise.

Oceans happen to be our major source of salt but there are many human races that did not evolve on sea beaches. We have survived in jungles and places far away from oceans. That also means we are not dependent on oceans for our survival. So, consumption of salt should not be a compulsion to make us non-poisonous.

Does that also mean that we as humans are not vegetarian but non-vegetarian? We have many theories that suggest we are vegetarian.

What is the correct fact about us? Any facts and thoughts are welcome.