There is a lack of compelling evidence to support the necessity of organic or grass-fed labels for animal source foods.

“I like to try to counteract the narrative that says you know it has to be organic and grass-fed and I think ken berry talks about panda massage I talked about you know water with unicorn tears and harvested by the Vestal Virgins under the full moon whatever the label frame is that's all narrative stuff it's very difficult if not impossible to find compelling evidence now that's not to say we can't find quantitative differences right we have exquisite abilities to detect differences what we lack is the ability to say the biological significance of those difference especially in light of an entire diet or living situation”