So, for someone who isn't good at reading scientific papers - if my BMI is low but I consume a lot of meat, how much worse is that than being vegetarian?
No one can say. It depends on many factors: your general health, age, genetic disposition, the composition of the rest of your diet, your general lifestyle (e.g. exercise, drug consumption, social status, mental health, ...).
If you are a homeless drug addict, being a vegan or vegetarian won't help improving your overall health. Likewise, being a well-off employed young individual in a stable and happy relationship who does regular health-checkups is more than enough to counter the daily 250g rare steak...
