The rib eye steak is a beef steak that comes from the rib section of a steer's longissmus dorsi muscle. The rib steak has the bone and cap muscles removed. It is very well marbled with fat that makes for a tender and juicy steak with little need for marinating. As a beef steak, the rib eye provides a good source of protein and nutrients, but it is also high in fat and cholesterol and as such, you should eat in moderation.
Calories and Protein
A rib eye steak comes in an average serving size of around 294 g, or about 10.5 oz., per steak. This size steak provides 541 calories and 64.56 g of protein. Steaks do not provide any carbohydrates or dietary fiber, but are high in fat with 29.36 g in a serving. Based on a 2,000-calorie diet, this steak accounts for more than 25 percent or your daily calorie intake.
Vitamins
Rib eye steaks are a good source of vitamins, especially the various B vitamins. A 294 g steak provides 0.187 mg of thiamin, 0.337 mg of riboflavin, 16.865 mg of niacin, 1.275 mg of pantothenic acid, 1.414 mg of vitamin B-6, 21 micrograms of folate, 3.35 micrograms of vitamin B-12, 1.02 mg of vitamin E and 3.5 micrograms of vitamin K.
Minerals
The average rib eye steak is packed full of minerals. One steak provides 51 mg of calcium, 3.93 mg of iron, 55 mg of magnesium, 515 mg of phosphorus, 820 mg of potassium, 136 mg of sodium, 11.69 mg of zinc, 0.176 mg of copper, 0.023 mg of manganese and 69.5 micrograms of selenium.
Amino Acids
Amino acids combine to form proteins. Amino acids and protein are the building blocks of life. They are essential for growth, tissue repair and digestion. Essential amino acids are those that the body cannot make naturally. As a result, they must come from food. A rib eye steak provides all the essential amino acids, as well as non-essential amino acids and conditional amino acids, which are usually not essential except in times of illness and stress. The amino acids in a serving of rib eye steak include 0.425 g of tryptophan, 2.580 g of threonine, 2.938 g of isoleucine, 5.137 g of leucine, 5.456 g of lysine, 1.682 g of methionine, 0.834 g of cysteine, 2.550 g of phenylalanine, 2.058 g of tyrosine, 3.204 g of valine, 4.174 g of arginine, 2.061 g of histidine, 3.925 g of alanine, 5.881 g of aspartic acid, 9.693 g of glutamic acid, 3.932 g of glycine, 3.079 g or proline, 2.543 g of serine and 0.679 g of hydroxyproline.
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