Red meat is rich in sulfur containing amino acids, which is one of the rate limiting elements. Our bodies need to create glutathione and it's so important that any type of oxygen doesn't damage a particular cell. Emotions actually have a biochemical signal - dopamine, serotonin, oxytocin,. All those things. So when you're fearful, angry, all that stuff, your cortisol goes up and that causes inflammation down the road.