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