1000 µg = 1 mg = 0.001 g

mandarines 500 g**
protein 2 g
protein quality 26 %
fat 2 g
linolenic acid 90 mg
carbs 50 g
vitamin E activity 2 mg
total carotenes 4 mg
vitamin B1 300 µg
vitamin B2 150 µg
vitamin B3 1 mg
vitamin B6 110 µg
biotin 2 µg
folic acid 35 µg
vitamin C 150 mg
calcium 160 mg
magnesium 50 mg
iron 2 mg
zinc 310 µg
silicon 15 mg

** Souci, Fachmann, Kraut;
Food Composition And Nutrition Tables
Medpharm Scientific Publishers Stuttgart