1000 µg = 1 mg = 0.001 g

prunes 500 g**
protein 3 g
fat 1 g
linolenic acid 155 mg
carbs 50 g
vitamin E activity 4 mg
total carotenes 2 mg
vitamin B1 360 µg
vitamin B2 210 µg
vitamin B3 2 mg
vitamin B5 1 mg
vitamin B6 220 µg
biotin 1 µg
folic acid 10 µg
vitamin C 27 mg
vitamin K 60 µg
calcium 70 mg
magnesium 50 mg
phosphorus 90 mg
potassium 2 g
sodium 9 mg
chloride 8 mg
iron 2 mg
zinc 500 µg
manganese 390 µg
copper 498 µg
nickel 56 µg
chromium 10 µg
molybdenum 30 µg
vanadium 10 µg
fluoride 5 µg
iodide 9 µg
boron 2 µg
silicon 2 mg
selenium 2 µg

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