1000 µg = 1 mg = 0.001 g

tomatoes 300 g**
protein 5 g
protein quality 8 %
fat 1 g
linolenic acid 27 mg
carbs 13 g
vitamin E activity 4 mg
total carotenes 3 mg
vitamin B1 280 µg
vitamin B2 175 µg
vitamin B3 3 mg
vitamin B5 2 µg
vitamin B6 500 µg
folic acid 80 µg
vitamin C 220 mg
vitamin K 96 µg
calcium 26 mg
magnesium 41 mg
phosphorus 54 mg
potassium 726 mg
iron 2 mg
zinc 504 µg
manganese 393 µg
copper 181 µg
nickel 12 µg
chromium 15 µg
aluminium 5 µg
fluoride 96 µg
boron 345 µg
silicon 8 µg
selenium 3 µg

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