One cup of cooked parboiled rice provides 41 grams of total carbohydrates, or about one-third of the recommended daily intake of 130 grams. The same portion has 1.4 grams of fiber, which supplies 4 percent of men’s and 6 percent of women’s daily fiber. Parboiled rice has double the fiber than you'd get from cooked white rice. It has a low glycemic score of 38, compared with a high 89 for white rice, notes Harvard Health Publications. A low glycemic score indicates that the carbohydrates in parboiled rice do not cause a large spike in blood sugar.
B Vitamins
Parboiled rice is especially rich in niacin, providing 4 milligrams, or 23 percent of the recommended daily intake in 1 cup of cooked rice. You’ll also get 19 percent of the daily intake of vitamin B-6. These values are about double the amount you would get from non-enriched white rice. Your body needs B vitamins to metabolize food into energy, but they also fill other roles, such as helping make hormones and neurotransmitters. Vitamin B-6 removes the amino acid homocysteine from your bloodstream by turning it into other substances. This might help keep your heart healthy; high levels of homocysteine are associated with an increased risk of cardiovascular disease.
Minerals
One cup of cooked parboiled rice supplies 2 to 3 percent of the recommended daily intake of calcium, iron, magnesium and potassium. You'll get a slightly bigger boost of zinc, with 1 cup containing 0.58 milligrams of zinc. That amount represents 5 percent of men’s and 7 percent of women’s daily needs. Zinc performs vital roles throughout your body, from forming the structure of proteins to regulating DNA. If you don’t get enough zinc, your immune system becomes impaired; it needs zinc to produce the cells that fight bacteria and infections.