Table 1. General nitrate content (mg/100 g fresh weight) in different plants (Gassara et al., 2020; Schullehner et al., 2018)

Nitrate content Type of plant
>2,500 Celery, cress, lettuce, spinach, rucola
1,000–2,500 Chinese cabbage, endive, leek, parsley
500–1,000 Turnip, savoy cabbage, cabbage
200–500 Carrot, cucumber, pumpkin, broccoli
<200 Potato, tomato, onion, eggplant, mushroom, asparagus