Rocket

Rocket is high in salicylates, and it is eaten raw in quantity as a salad base rather than as a garnish — that volume is what makes it count.

Rocket takes up metals from the soil the way most fast-growing leaves do, and it is eaten raw and by the handful. Washing removes soil, not what the plant absorbed. The nickel here follows a survey of heavy metals in VEGETABLES. A vegetable takes up what its soil holds, so a figure of this kind describes the growing region as much as the plant.

Rocket is a moderate-oxalate leafy green — lower than spinach but still a source in large raw amounts. Rotating it with low-oxalate greens keeps oxalate intake down.

Rocket is genuinely low: a leaf, and leaves store little. Vegetables split on this axis by which organ you eat - storage organs like onion and garlic hoard fructans, while leaves, stems and young shoots do not. Knowing which part of the plant is on the plate answers most of the question.

Rocket carries no meaningful histamine and does not liberate any. Fresh vegetables are the reliable ground on this axis - it is fermenting them, or letting them sit, that changes the answer.

Rocket is a leaf, and leaves store nothing - a plant's fructan reserve goes into roots, bulbs and tubers, the organs that have to survive a winter. Salad leaves are the safest category on this axis for that reason.

Rocket is low. A leaf eaten raw and fast, peppery from glucosinolates and not from anything fermented - a handful in a salad, gone the day it wilts. The few surveys that measured vegetables for tyramine put the leafy and green ones at the bottom of their range.