Top sirloin steak is butchered from the upper loin portion of a steer. Also known as sirloin strip steak, center cut sirloin or boneless sirloin butt steak, this cut of beef consists of any of the sirloin steaks with the bones removed. Not as tender as some steaks, top sirloin is still popular, delivering a lot of flavor. While it is a source of protein, vitamins and minerals, top sirloin also contains substantial amounts of fat.
Contents
An 8 oz. serving of top sirloin steak weighs 227g. Around 67g of that weight consists of protein. Fats make up almost 26g, or around 41 percent of the amount of fat recommended per day. The remainder is made of other nutrients and water. Top sirloin steak contains no carbohydrates and little dietary fiber.
Calories
There are approximately 400 calories in 8 oz. of top sirloin steak. Protein delivers approximately 280 calories. Over 40 percent of the remainder, or 120 calories, comes from fat. A single serving of top sirloin can provide as much as 40 percent of the daily required caloric intake for the average person.
Vitamins
Top sirloin steak is also a source of many vitamins. An 8 oz. serving has almost 4mcg of vitamin B12, around 150 percent of the daily value, 19mg of niacin, or more than 100 percent, 1.5mg of vitamin B6, or 100 percent, and 0.35mg of riboflavin, or 30 percent of the daily recommended intake for the average adult. Other vitamins in top sirloin include vitamins E, K, folate, thiamin and pantothenic acid.
Minerals
Other dietary minerals are also available from top sirloin steak. An 8 oz. serving contains high levels of zinc, at 12mg or more than 100 percent, phosphorus at 525mg or over 75 percent, and selenium at around 75mcg or 135 percent of what an average adult diet requires each day. Smaller but still significant amounts of other minerals include 4mg of iron or 50 percent, and potassium at approximately 850mg or 18 percent. Top sirloin also contains smaller quantities of other minerals, such as calcium, copper, manganese and sodium.
Warning
A single 8 oz. serving of top sirloin steak also holds around 180mg of cholesterol, or well over half of the daily amount recommended. The same measure is also high in saturated fat, delivering almost 26g or 40 percent of the recommended daily allowance. Nearly half of the fat in top sirloin steak is saturated fat. High levels of cholesterol and saturated fat within the diet pose a potential threat to cardiovascular health, according to the American Heart Association.
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