Is Onion & parmesan Spinach Safe for Kidney Stones? (Caution)
mg oxalate
per serving
Serving: (109 g)
Verdict: 🟡 Caution
Per 100g: 80.7 mg
Data: Harvard T.H. Chan SPH (2024)
The bottom line for Onion & parmesan Spinach: Caution (🟡) at 88 mg oxalate per serving. It's the middle of the road — usable, but with guardrails. Half portions, occasional frequency, calcium pairing, and watching your total daily intake keeps it workable.
Putting Onion & parmesan Spinach in context: it lands well above the category average of 27 mg. In the database, 80% of vegetables (219 of 271) fall in the 🟢 Safe group (under 25 mg oxalate/serving). The typical vegetables here averages 27 mg oxalate per serving, so Onion & parmesan Spinach runs 225% above that baseline. That places it on the higher end for oxalate in its category. Why this matters: the gap between two Safe foods can be wide — one may hold 5 mg oxalate while another sits at 24 mg. The lower one leaves more room in your day. See all vegetables rated Caution for a full side-by-side.
Why does the safe threshold matter?
The 25 mg line is the reference point clinicians use to separate everyday foods from ones that need caution. Every value on this page traces back to Harvard's 2024 lab analysis, so the threshold is applied to measured data rather than estimates. Applied to Onion & parmesan Spinach: 88 mg oxalate per — Caution per Harvard (2024).
Can I eat this food every day?
For Safe foods (under 25 mg/serving), daily use is generally fine. Caution and Avoid foods work better as occasional items — rotate them with safer options so no single high-oxalate food becomes a habit. For Onion & parmesan Spinach, the measured oxalate value is 88 mg per (Caution).
Where does the oxalate data come from?
Every oxalate figure is sourced from Harvard T.H. Chan SPH (2024), distributed via the OHF database. The values come from actual lab measurements of the foods — not from database averages or estimates. Onion & parmesan Spinach comes in at 88 mg oxalate per (Caution) in the measured database.
Should I also check sodium and calcium?
Yes — kidney stone risk isn't just about oxalate. High sodium increases urinary calcium (a stone promoter). Adequate dietary calcium (from food, not supplements) actually binds oxalate in your gut. Check the food's full nutrition page for the complete picture. For Onion & parmesan Spinach, the measured oxalate value is 88 mg per (Caution).