How Much Oxalate Is in Matcha tea?
mg oxalate
per serving
Serving: 1 cup (240 g)
Verdict: 🟢 Safe
Per 100g: 0.8 mg
Data: Harvard T.H. Chan SPH (2024)
In practical terms, Matcha tea is a low-risk food for kidney stone patients. Its 2 mg oxalate per serving stays under the 25 mg line, so it can appear in your regular rotation without extra calculation. As always, staying hydrated and getting dietary calcium supports stone prevention.
Among beverages, Matcha tea sits well below the category average of 40 mg. For context, 82 out of 92 beverages (89%) are rated 🟢 Safe (under 25 mg oxalate/serving). The average beverages in our database has 40 mg oxalate per serving — which means Matcha tea is 95% below the category norm. Within its specific category, Matcha tea ranks among the lower-oxalate options. 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 beverages rated Safe 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. Applied to Matcha tea: 2 mg oxalate per 1 cup — 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. Applied to Matcha tea: 2 mg oxalate per 1 cup — Safe per Harvard (2024).
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 Matcha tea: 2 mg oxalate per 1 cup — Safe per Harvard (2024).