Nutrition in Pork Roast

Boneless pork sirloin roast, with the fat trimmed, is high in protein and B vitamins. One 3 oz. serving provides over 40 percent of the dietary reference intake, DRI, of protein and over 60 percent of the DRI for some B vitamins. Percentages listed are for adults under age 50.

Calories

One 3 oz. serving of pork roast contains 168 calories. All of these calories come from fat and protein, as there are no carbohydrates in pork roast. Pork roast also contains no sugar or fiber.

Protein

One 3 oz. serving of pork roast contains 24.5 g of protein. This is 53 percent of the DRI for women and 44 percent for men. The protein in pork roast is comprised of 18 different amino acids. Pork roast contains all 18 essential amino acids, which makes it a complete protein. Pork roast is particularly high in the amino acid glutamic acid, a neurotransmitter that helps in the firing of neurons in the brain. Pork roast is also high in aspartic acid, which boosts stamina and assists in metabolism.

Fat

A 3 oz. serving of pork roast contains 7 g of fat. Two and a half grams of this fat are saturated fat, 3 g are monounsaturated fat and less than 1 g is polyunsaturated fat. One serving of pork roast also contains 73 mg of cholesterol, which is nearly 25 percent of the maximum recommended daily allowance of 300 mg.

Minerals

While pork roast is low in some minerals such as calcium, magnesium and manganese, it is high in other minerals, particularly selenium. One serving supplies 67 percent of the DRI for selenium, as well as 18 percent for phosphorus and 14 percent for potassium. Three oz. of pork roast also provides 27 percent of the DRI for zinc for women and 12 percent for men.

Water-Soluble Vitamins

Pork roast contains very little water-soluble vitamin C, but it does provide significant amounts of many of the water-soluble B vitamins. One serving of pork roast supplies over 60 percent of the DRI for thiamin and over 30 percent of the DRI for B6. One serving also provides over 25 percent of the DRI for riboflavin, niacin and B12, as well as over 10 percent of the DRI for pantothenic acid and choline.

Fat-Soluble Vitamins

The only fat-soluble vitamin provided in large amounts in pork roast is vitamin D. One serving provides 10 percent of the DRI for vitamin D. Each serving supplies less than 2 percent of the DRI for vitamins A, E and K.