As we celebrate the 235th birthday of our great nation, we asked a number of community leaders to share their thoughts on what the Fourth of July means to them. The Fourth of July reminds me very simply of our freedom.
Vitamin A: 1 IU is the biological equivalent of 0.3 mcg retinol, or of 0.6 mcg beta-carotene. 1  Vitamin D: 1 IU is the biological equivalent of 0.025 mcg cholecalciferol or ergocalciferol. 2  Vitamin E: 1 IU is the biological equivalent of 0.67 mg d-alpha-tocopherol, or 0.9 mg of dl-alpha-tocopherol.
The microgram (mcg or Âµg) is the unit of mass in the metric system (SI, International System of Units). 1 microgram (mcg or Âµg) = 0.001 milligrams (mg) = 0.000000001 kilogram (kg) = 0.0000000352739619 ounces (oz) = 0.000001 grams (g).he microgram (mcg or Âµg) is the unit of mass in the metric system (SI, International System of Units). 1 microgram (mcg or Âµg) = 0.001 milligrams (mg) = 0.000000001 kilogram (kg) = 0.0000000352739619 ounces (oz) = 0.000001 grams (g).