About OxalateWatch

Our Mission

KidneyStone patients face a confusing mix of dietary advice. Some foods are clearly safe; others are clearly problematic. But most fall somewhere in between — and the difference often comes down to a single number: oxalate content.

We built OxalateWatch to make that number easy to find, understand, and act on. No sign-ups, no paywalls, no medical jargon. Just lab-measured oxalate data from one of the world's leading research institutions, paired with USDA nutrition values, in a format that tells you what you need to know in seconds.

Why Trust Our Data?

Our Rating System

Every food receives one of three ratings based on its oxalate content per standard serving:

• 🟢 Low Oxalate — Less than 25 mg oxalate per serving. These foods are generally well-tolerated by most kidney stone patients.
• 🟡 Moderate Oxalate — 25–99 mg oxalate per serving. These foods can fit into a kidney-stone diet with portion control and balance.
• 🔴 High Oxalate — 100 mg or more per serving. These are high-oxalate foods that most stone formers should limit or avoid.

We also flag sodium, animal protein, and calcium content — because oxalate is not the only factor that matters. High sodium increases calcium in urine, and animal protein raises uric acid levels. Calcium from food, on the other hand, can actually help by binding oxalate in the gut.

Who We Are

OxalateWatch is operated by an independent data editorial team. We are researchers and data editors — not clinicians — and our role is strictly to collect, verify, and present published nutrition data in a format that is easy to search and act on. The site is operated from Wuhan, China, and serves English-speaking readers worldwide. We are a small, focused team: we would rather maintain a smaller database of verified values than publish a large one with guessed numbers.

Our Editorial Team

OxalateWatch is edited by a small team of data, content, and research editors. Each is an editorial role — none of us are clinicians, and we do not provide medical advice. Our job is to verify and present published food composition data accurately.

• Sarah Chen — Data Editor: curates and verifies all food composition values against the Harvard (2024) database and USDA FoodData Central.
• Marcus Reed — Content Editor: edits every guide and blog post and checks the practical advice against the data tables.
• Elena Novak — Research Editor: tracks new studies in kidney stone nutrition and maintains the site's source list.

You can reach us directly at cs@oxalatewatch.com, and every food page tells you exactly which dataset its numbers come from — so you can check our work against the source.

What We Don't Do

• We do not provide medical advice. This is dietary reference information.
• We do not recommend specific dosages of supplements or medications.
• We do not diagnose, treat, or claim to cure any condition.
• We do not publish estimated or unverified values. Every data point is traceable to a published source (Harvard T.H. Chan SPH 2024 or USDA FoodData Central), and pages state which source each number comes from.

Our Data Sources

Questions or feedback? Contact us.