A discussion on oxalates, inspired by Toxic Superfoods, by Sally Norton

The effects of oxalate overload on the body was the topic of Red Clover Clinic’s July/August 2021 Newsletter. Now comes a new, comprehensive resource, Toxic Superfoods: How Oxalate Overload is Making you Sick – and How to Get Better by Sally Norton, published at the beginning of the year.  I recommend Norton’s book to anyone who wants to learn more about what oxalates are, what effects they have on health, how to address issues associated with oxalate overload, and how to prevent this issue in the first place.

Briefly, oxalates are a crystalline substance found in plants and matabolically produced by our bodies. They can accumulate in our tissues, causing pain and dysfunction. The list of symptoms caused by oxalate overload is long. Besides pain, a partial list includes inflammation, arthritis, insomnia, chronic fatigue, muscle spasms, urogenital pain, brain fog, diarrhea, constipation, reflux, autoimmune disorders, rashes, eczema, bruising from within, headaches, heart arrhythmias, blood pressure irregularity, cold intolerance, depression, anxiety, inflamed gums, eye/eyelid irritation, and tinnitus. 

Not everyone has an issue with oxalate overload, but I do frequently see evidence of oxalate damage in my clients. At the very least, it is important to educate yourself about the harm you could cause to your health if you drink a spinach smoothie every day, or drink almond milk, snack on almonds, and bake with almond flour. 

I highly recommend that you reread the July/August 2021 Newsletter or take the time to read Sally Norton’s well-researched book. I found the following excerpt particularly interesting, explaining why so few people and practitioners know about oxalate overload:

No field of science is charged with (or even interested in) developing a “whole body” theory of what excessive dietary oxalate does to us, so it is especially difficult to recognize dietary oxalate overload as a unified problem with a common cause. The early signs and symptoms of oxalate poisoning are not well known, can be quite common and diverse, can appear gradually and intermittently, and are dissimilar from person to person. Most important, we don’t notice the gradual erosion of tissues and their lost function until metabolic reserves are depleted and the disease process interrupts our lives. (p. 88)

Urine tests of oxalate excretion levels are the only laboratory tests available. Unfortunately, they aren’t particularly accurate, or as Norton puts it,  “Urine testing is akin to taking a still photo of a moving target.” She describes a study that was done by the VP Foundation, in which nearly 4,000 women with vulvar pain were researched. Each woman’s individual urine void for three consecutive days was analyzed for oxalate content. “The study revealed that oxalate handling occurs in cycles, appearing as two or three brief but very steep peaks of elevated excretion occurring at the same time on each day in each subject, but at different times for each subject. For many subjects, their symptoms also occurred in cycles. Interestingly, despite the toxic elevations in urine oxalate, 24-hour urine level totals were normal in all the subjects.” (p. 99)

I also found Norton’s discussion of why oxalate accumulations start to be interesting. Oxalates, in general, tend to accumulate in tissues that are injured, inflamed, stressed, or undernourished. In other words, they settle into the weakest areas, which don’t have the health to repel them. Non-steroidal anti-inflammatory drugs (Motrin, Advil, for example), she says, can distress the gut lining and kidneys, which in turn can lead to oxalate damage and accumulation. 

I would be happy to discuss the possibility of oxalate issues with you at your next appointment.