Safety: Roselle (Red Sorrel - Hibiscus Sabdariffa)
mg oxalate
per serving
Serving: 1 cup (57 g)
Verdict: 🟡 Caution
Per 100g: 166 mg
Data: Harvard T.H. Chan SPH (2024)
In practical terms, Roselle (Red Sorrel - Hibiscus Sabdariffa) sits in the 25-99 mg range with 95 mg per serving, so treat it as a sometimes-food. Keep servings modest, don't stack it with other moderate-oxalate items in one day, and pair it with calcium to blunt absorption.
Among vegetables, Roselle (Red Sorrel - Hibiscus Sabdariffa) sits well above the category average of 27 mg. For context, 219 out of 271 vegetables (80%) are rated 🟢 Safe (under 25 mg oxalate/serving). The average vegetables in our database has 27 mg oxalate per serving — which means Roselle (Red Sorrel - Hibiscus Sabdariffa) is 251% above the category norm. Within its specific category, Roselle (Red Sorrel - Hibiscus Sabdariffa) ranks on the higher end for oxalate. This context matters because two 'Safe' foods can have very different oxalate levels — one might have 5 mg while another has 24 mg. Both are Safe, but the first gives you more dietary flexibility. Browse all vegetables rated Caution to compare within the same verdict level.
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. For Roselle (Red Sorrel - Hibiscus Sabdariffa), the measured oxalate value is 95 mg per 1 cup (Caution).
Can I eat this food every day?
Daily eating is fine for Safe foods (under 25 mg/serving). For Caution or Avoid foods, spread them out and alternate with low-oxalate picks. The idea is keeping your weekly oxalate load manageable, not eliminating any single food. For Roselle (Red Sorrel - Hibiscus Sabdariffa), the measured oxalate value is 95 mg per 1 cup (Caution).
Where does the oxalate data come from?
Harvard T.H. Chan School of Public Health (2024) via the OHF database. These are direct laboratory measurements — the most reliable oxalate data available for food. Roselle (Red Sorrel - Hibiscus Sabdariffa) comes in at 95 mg oxalate per 1 cup (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. Roselle (Red Sorrel - Hibiscus Sabdariffa) comes in at 95 mg oxalate per 1 cup (Caution) in the measured database.