Humans require specific amounts of essential amino acids rather than a generic daily requirement for protein.

“protein we should think of as a vitamin pill we don't have a daily requirement for a vitamin pill we have a requirement for 12 vitamins inside the pill we don't actually have a daily requirement for protein we have a requirement for nine or 20 amino acids inside of it”

Consuming isolated protein sources is often necessary for those following a plant-based diet to meet protein requirements without excessive caloric intake.

“it's very difficult to do without an isolated source of protein. So unless you're going to supplement with an isolated plant source of protein, it's very difficult to get enough without going over on total calories”