Oxalate Content: 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 oxalate per 100g matter?
Per-100g values put every food on the same scale, which is handy when serving sizes differ a lot between foods — or when your portion doesn't match the standard serving. It lets you compare apples to apples on oxalate density. Roselle (Red Sorrel - Hibiscus Sabdariffa) comes in at 95 mg oxalate per 1 cup (Caution) in the measured database.
How accurate is the oxalate measurement?
The measurements use ion chromatography, the accepted reference method for oxalate. That means real lab values for each food rather than inferred numbers. Some natural variation exists between samples, but this is the strongest published data set. Roselle (Red Sorrel - Hibiscus Sabdariffa) comes in at 95 mg oxalate per 1 cup (Caution) in the measured database.
How does this compare to other foods?
The ratings split at 25 mg (Safe) and 100 mg (Avoid), with 25-99 mg in the Caution band. For context against similar foods, the category pages on OxalateWatch rank every item in that group by oxalate. Applied to Roselle (Red Sorrel - Hibiscus Sabdariffa): 95 mg oxalate per 1 cup — Caution per Harvard (2024).