Toxic Superfoods: How Oxalate Overload Is Making You Sick--and How to Get Better

Toxic Superfoods: How Oxalate Overload Is Making You Sick--and How to Get Better

by Sally K. Norton MPH

4.7 (2,024)

4.7 stars from 2,024 reviews. Top 80% of Nonfiction books we track.


$13.99At peak price

Last checked: May 5, 2026

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Perfect for you if...

  • You've tried everything for your chronic pain, fatigue, or brain fog and nothing's worked, so you're ready to question conventional nutrition advice.
  • You eat a plant-heavy diet and wonder why you don't feel as good as you're supposed to on all those superfoods.
  • You're interested in the science behind food sensitivities and want actionable steps, not just diagnosis.

Maybe not for you if...

  • You're not interested in altering your diet significantly or cutting out foods you love based on one nutritional theory.
  • You prefer general wellness books over detailed nutritional science and charts.
  • You're looking for a quick fix rather than understanding the underlying chemistry of what you eat.

About this book

A nutrition educator examines how certain foods promoted as healthy may contribute to illness. Sally K. Norton, MPH, explores oxalates—chemical compounds found in plants—and their potential effects on the human body. She argues that common foods like spinach, almonds, and sweet potatoes, despite their reputation as nutritious choices, contain high levels of oxalates that may trigger fatigue, inflammation, anxiety, recurrent injuries, and chronic pain in some people. Norton draws on her own experience with chronic health problems, which she attributes to oxalate consumption from her plant-heavy diet. The book provides a program designed to reduce oxalate intake, including food charts identifying items to avoid and alternatives to consider. It also offers guidance on managing energy levels, mood, brain function, and chronic pain through dietary changes. The book challenges the widespread recommendation to increase plant consumption, suggesting that a high-plant diet may not be beneficial for everyone.

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Kindle price over time. Green zones = periods when the book was free.

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Free$7.00$13.99Aug '21Aug '23Jun '25May '26
$1.99$13.99

Price has dropped 10 times over the last 5 years. Goes on sale roughly every 122 days. Typically stays discounted for 5 days.

Sales Rank

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#3,511#355,441#707,371Nov '21Jul '23Mar '24Apr '26

Currently around #24K in the Kindle store — a steady mid-list seller. Sales have softened 50% recently.

Rating & Reviews

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4.0★4.5★5.0★May '23Nov '23Apr '24Jan '26RatingReviews

Currently 4.7★ from 2,024 reviews

Gaining approximately 44 new reviews per month. Steady word of mouth growth. Rating has remained stable at 4.7 over the tracking period.

Sale Prediction

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Free$7.00$13.99Aug '21Aug '23Jun '25May '26PredictedMay '26

Actual Predicted

This book goes on sale roughly every 122 days. Next drop estimated in about 11 weeks. Typical discount: 86% off.

Prices shown in USD from Amazon US. We continuously pull new data to improve tracking. If dates look old, it usually means there has been no significant change since the last data point.

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Sally K. Norton MPH

1 book on Vagrant Press

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