How Much Oxalate Is in Octopus?
mg oxalate
per serving
Serving: 3 oz (85 g)
Verdict: 🟢 Safe
Per 100g: 1 mg
Data: Harvard T.H. Chan SPH (2024)
Here's the takeaway: Octopus earns a Safe rating (🟢) at 1 mg oxalate per serving. Being under 25 mg means it fits comfortably in everyday eating. Keep your usual habits — adequate fluids and calcium in meals — and Octopus poses no special concern.
Putting Octopus in context: it lands below the category average of 2 mg. In the database, 100% of seafood (55 of 55) fall in the 🟢 Safe group (under 25 mg oxalate/serving). The typical seafood here averages 2 mg oxalate per serving, so Octopus runs 36% below that baseline. That places it among the lower-oxalate options 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 seafood rated Safe for a full side-by-side.
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. Applied to Octopus: 1 mg oxalate per 3 oz — Safe per Harvard (2024).
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. For context, Octopus measures 1 mg per 3 oz, rated Safe.
How does this compare to other foods?
Foods under 25 mg per serving are rated Safe. Foods between 25-99 mg are Caution. 100+ mg is Avoid. Check the food's category page on OxalateWatch to see how it compares to similar foods. For Octopus, the measured oxalate value is 1 mg per 3 oz (Safe).