🥬 Leafy Greens — 🟢 Oxalate Safe Foods

Leafy greens hold the widest oxalate spread of any subgroup in the database — a shredded lettuce salad can measure under 2 mg while a half-cup of boiled spinach approaches 500 mg, a difference of more than two hundredfold inside one visually similar food family. The pattern behind the spread: both beet greens and chard carry oxalate at spinach-level concentrations, kale and collards sit in the moderate middle, and the loose-leaf lettuces plus arugula stay near zero. For a stone patient the subgroup rule is simple — the soft, dark, deeply-cooked greens are the portioned ones; the crisp, pale, and raw leaves are the free ones. Boiling and draining the high end changes the math more here than in any other subgroup, because these leaves release soluble oxalate into the water readily.

Vegetables are the widest-oxalate-spread food group in the database: a cucumber measures around 1 mg of oxalate per serving while a half-cup of cooked spinach approaches 493 mg. That spread is why blanket advice like 'eat more vegetables' does not work for stone patients. What matters is the specific leaf, the serving, and the preparation. Boiling and draining can remove a meaningful share of soluble oxalate from many greens, and pairing any higher-oxalate vegetable with a calcium-rich food at the same meal reduces absorption. Low-oxalate anchors in this group include cucumber, lettuce, and most squash varieties; the leafy dark greens are the ones to portion carefully.

This page isolates one slice of a food category: a single verdict within a single subgroup. That granularity matters because categories are rarely uniform — leafy greens, for example, contain both near-zero-oxalate lettuces and very-high-oxalate spinach. Knowing which foods earned the safe, caution, or avoid label within a subgroup lets a stone patient shop with precision instead of avoiding whole food families.

["Everything on this page cleared the measurement bar: each food's oxalate per standard serving sits low enough that portion anxiety is unnecessary. That is a working distinction, not a technicality — a diet assembled from this list behaves like normal eating, with no arithmetic at the table. The habits that matter elsewhere (measuring, pairing with calcium, choosing preparation forms) can all be switched off for foods here, which is precisely what makes the overall pattern sustainable month after month.", 'Two footnotes keep this tier honest. First, safe refers to oxalate only — the sodium, sugar, and overall quality columns still apply, especially on packaged items. Second, safe is per standard serving: an unusual portion of even a low food adds up, though the slope is gentle enough that it rarely needs watching. For most stone patients this page is the shopping list; the caution and avoid pages are the reference material.']

This view isolates the Oxalate Safe slice of Leafy Greens: 26 foods share both the subgroup and the rating, so the oxalate values here are directly comparable for meal planning — no need to mentally adjust for different food families.