Hey, @pinkdrunkenelephants@lemmy.cafe , this is not a great way of showing this, because there's no real comparison between the different things listed. For instance, an average egg is about 6g of protein, which means that it's $.035/g. A single 5oz can of tuna will have about 22g of protein, which works out to about $.045/g. One pound of uncooked, boneless, skinless chicken breast will have about 105g of protein, which is around $.048/g. And so on, and so forth.

I also dispute your pricing models. In my area, boneless, skinless chicken breast is typically around $3/#, which brings it down to $.029/g. Ground beef is both more and less expensive, depending on fat content; 80/20 (20% fat) runs around $5.20/#, while 94/4 runs $8.50/# (...and doesn't taste very good by itself, unless you prefer your hamburders dryer than Ben Shapiro's wife). That ultra-lean ground beef has 96g/#, which brings it to $.089/g, while the delicious 80/20 only has 40g/#, bringing the price up to a steep $.13/g, almost 5x more expensive per gram than B/S chicken breasts.

If you don't care about taste, TVP can be had in bulk for cheap, and unflavored whey protein can also be bought in bulk.