science

Where I live grocery stores are a terrible example, all the plant proteins are jacked up in price with marketing about how it's organic and vegan and will cure cancer yada yada. And then the wheys they sell are blends with low actual protein content and/or poor aminos.

I buy my protein from a bulk supplements supplier, and soy is 75% of the cost of the cheapest whey, gram for gram of actual protein content.