On all canned beans the protein/ 100g is about 7g. I thought it was so little maybe because it takes the water into account, but it says the nutrition is about the beans when they’re drained. When I buy non canned beans that you have to cook yourself the protein is about 25g or something. Why?

On all canned beans the protein/ 100g is about 7g. I thought it was so little maybe because it takes the water into account, but it says the nutrition is about the beans when they’re drained. When I buy non canned beans that you have to cook yourself the protein is about 25g or something. Why?