This is hugely dependent on size, weight, metabolism, body composition, and a hundred other factors of any unique individual's health. A single number can't really be given, but as I'll cite from web MD an average adult male should have about 52 grams of protein, and an adult female requires about 46 grams of protein per day. This is highly variable with each person and their specific needs of course.
Your body can digest as much protein as you feed it. But will only make use of some. The human body does not do a good job with retaining protein.
About 30 grams.
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small intestine
1.29 grams of protein per pound of body weight. So if you weigh 100Lbs, take in 129 grams of protein per day. That only equals out to 21 grams per meal. Very reasonable
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One heaped tablespoon of peanut butter contains 5 grams of protein.
You can get more than just 94.9 grams of protein a day easily by making sure you have a source of protein at every meal, preferably 6 smaller meals a day, or even taking one or two protein shakes a day.
Since you're getting all the required nutrients as well as 15 grams of protein with this tasty shake, you can definitely use it as a meal replacement, to facilitate weight loss.
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100 grams has 326 calories
2 cups
High protein diet usually includes protein enhanced health foods such as protein bars, shake mixes, soy nuts and fresh or steamed vegetables and fruits such as berries, apple, banana and melon. The following website will provide a 7-day meal plan with 1,500 calories and 150 grams of protein: http://www.edietstar.com/shapeworks/1500calories.html