A lot of modern food toxins take action when they overspill the body's coping mechanisms, e.g. fructose congesting the liver, omega-6 fat not being burned and lingering in the bloodstream, WGA increasing gut permeability, full glycogen leading to hyperglycemic nerve damage, etc.
Each of these elements might be perfectly safe below a certain dosage or frequency. A diligent eater won't breach the dam with a single celebratory meal--it's often the second or third such consecutive meal that deals the damage.
Lots of: urban hiking, cycling, sprinting
Lots of: fresh meat, seafood, eggs, organs, tubers, starch fruits, vegetables, meat fat, dairy fat, oil fruits
Some: cured meat, dairy protein, sweet fruits, rice, pulses, tree nuts, oil seeds
Minimal: soy, refined proteins, sugar, liquid carbohydrate, grains, refined oils, peanuts