The Evolution of Liver Function Tests

LZ Granderson: We're going to be rapidly gaining more and more weight. As that shift happens, do the standards that we call health shift with it? He says liver function tests have drifted up over 40 years; what is considered normal today was not normal in 1982. LZ: You could have an ALT and an AST of 38 and 39 today and you're technically normal according to most labs. But I promise you, if we do an ultrasound of your liver, you have fat in it.