I've worked in the supplement industry, so while I'm not a FDA labeling expert I've been through several audits and provided support to the QC/QA team during an

I've worked in the supplement industry, so while I'm not a FDA labeling expert I've been through several audits and provided support to the QC/QA team during an audit. Applying a supplement facts panel instead of a nutrition facts panel requires very different QC processes, and depending on the food the testing requirements will be very different. I'd assume a big reason they switched is that the testing for a specific amino acid would be more expensive than a protein assay, plus since it's an animal product there would be a wider variability batch to batch and so might have caused issues with lot regularity under a supplement regime. Or it could be a straight marketing thing, having a supplement facts panel was causing consumer confusion/concern.