Peanuts are digestible and their protein is of excellent quality.Fresh pistachios contain an abundant amount of protein, calcium, zinc, boron, potassium, phosphorus, iron, tryptophan, vitamin B and vitamin E. An amount of 100 grams of fresh pistachios has a higher value in proteins than a steak. Therefore, peanuts are considered to be the best source of protein for people who do not eat meat.