Protein's daily intake varies from person to person. Generally speaking, people who keep fit and gain muscle need to consume 1.5-2g of protein per kilogram of body weight every day. Even if you have achieved your goal now, you don't need to run around. The daily intake of protein per kilogram of body weight should not be less than 1.2g ... Americans consume about 80 to 90g of protein per day on average, which is about twice the amount recommended by the National Institute of Medicine. However, there is a limit to how much protein your body can actually use. For most people, this limit is 25 to 30 grams per meal.