One really important thing to understand when you see these sorts of studies is that they are done in aggregate while every human being is different. There are

One really important thing to understand when you see these sorts of studies is that they are done in aggregate while every human being is different. There are people who can eat eggs and pork and smoke cigars and never suffer consequences, and there are some who are far less tolerant. If you're in a high-risk group because you've already suffered damage, you need to be very risk averse.