From what you just wrote, it appears you misunderstood what I said. Just to be clear:
Red kidney beans (50g): PDCAAS = 0.88, Protein = 11.25g
Basmati rice (50g): PDCAAS = 0.7, Protein = 4.5g
Red beans + rice (50g, 50g): PDCAAS = 1.0, Protein = 15.75g
Milk (500g..): PDCAAS = 1.0, Protein = 15.5g
So, from a protein perspective (according to PDCAAS), 500g of milk will give you the same amount of usable protein as the 100g rice and beans meal. There is nothing left on the table.
So, just eating kidney beans, PDCAAS would say that you aren't really getting the full benefit of the "protein on the label". But once you combine it with rice, you are getting the full benefit (according to PDCAAS).
You can't look at the digestibility of the two foods in isolation to make the calculations.
As long as you are eating a varied diet, PDCAAS is pretty pointless. If you have an eating disorder, or food scarcity issues, then it might become important.
Red kidney beans (50g): PDCAAS = 0.88, Protein = 11.25g Basmati rice (50g): PDCAAS = 0.7, Protein = 4.5g
Red beans + rice (50g, 50g): PDCAAS = 1.0, Protein = 15.75g
Milk (500g..): PDCAAS = 1.0, Protein = 15.5g
So, from a protein perspective (according to PDCAAS), 500g of milk will give you the same amount of usable protein as the 100g rice and beans meal. There is nothing left on the table.
So, just eating kidney beans, PDCAAS would say that you aren't really getting the full benefit of the "protein on the label". But once you combine it with rice, you are getting the full benefit (according to PDCAAS).
You can't look at the digestibility of the two foods in isolation to make the calculations.
As long as you are eating a varied diet, PDCAAS is pretty pointless. If you have an eating disorder, or food scarcity issues, then it might become important.