Updated: December 2017

Low salicylate diets have been recommended for hyperactivity, autism, hives, asthma, respiratory, digestive problems, etc.

But, does the diet live up to the hype!

Sensitivity to Natural Food Compounds is a great introduction to this article.

What are salicylates?

Salicylate is a general term for several related compounds in plants. The most well-known compound is acetylsalicylic acid (ASA) – the active ingredient in aspirin. ASA was originally isolated from willow bark. Food salicylates are mainly in the non-acetylated form, so they are a little different than ASA. They are considered nutraceuticals (naturally occurring chemicals in plant foods with health benefits – particularly anti-inflammatory).

Can low salicylate diets improve health?

Dr. Feingold first popularized the concept of food salicylates sensitivity in the 1960s and 70s. The Feingold diet was promoted to treat hyperactivity in children (reduced salicylates, food colours, certain additives, etc.). In the 1980s, a research team at the Royal Prince Alford Hospital (RPAH) in Australia studied a diet that eliminated the above compounds, plus amines and glutamate. The Feingold and RPAH diets still have followers but are not widely accepted in the medical community.

Research interest has shifted toward low salicylate diets for individuals that are sensitive to aspirin. A recent Canadian study demonstrated improved nasal symptoms when subjects with aspirin-exacerbated respiratory disease followed a low salicylate diet compared with their usual diet (they followed their usual diet or a low salicylate diet for six weeks and then switched).  Their symptoms were evaluated by a physician before the study started and at the end of each diet. The physician did not know what diet the subjects were following (physician blinding). These results are exciting because it is the first scientific study evaluating a low salicylate diet (as the only restriction). Some internet websites have used this study as proof that a low salicylate diet is effective, but it is important to keep the following in mind:

Despite the drawbacks, these results are exciting and will hopefully encourage future research.

Salicylates in food

Defining a precise list of high salicylate foods is not possible due to the lack of research and tremendous variation. The most recent information comes from the article: A systematic review of salicylates in foods: estimated daily intake of a Scottish population. For many foods, there was only one sample, but for the foods with more than one sample, there was great variability. For example, the five samples of blueberry ranged from 0.33 – 27.80 mg/kg and the three samples of chilli powder ranged from less than 0.2 – 1466 mg/kg. Salicylate content is affected by growing conditions (soil, temperature, etc.) and storage/processing. Therefore, salicylate levels of food grown in one area, such as Australia (location of most of the research), may be different than another area.

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4 Responses

  1. I am unable to digest or topically apply oils (I’ve tried 14 kinds) without gut discomfort, gas, nausea. I have read that omega-3 oils can mitigate salicylate sensitivity but I do not tolerate fish or fish oil either. I have no way to get an omega-3. I’ve tried krill, 3 dif. fish oils and plant based omega-3s. I really need some oil in my diet. I have none.

    1. What about whole foods that are high in fat? You may tolerate whole foods better than refined oils. Examples: nuts, seeds (ground flax is a good source of omega 3), avocado, etc.

      When you read statements such as “omega 3 mitigates salicylate sensitivity”, these statements are speculation, not fact. However, omega 3 is important for our overall health, so it would be good to try and have a source in your diet.

  2. A major confounding factor in the study you mention above is that in following the low salicylate diet patients needed to avoid wine and beer. Research has shown that the vast majority of AERD patients have respiratory reactions to alcohol (not due to salicylate content). Reducing alcohol intake alone would be expected to result in improvements. AERD experts such as Dr. White of Scripps Clinic and Dr. Laidlaw of the Brigham & Women’s AERD Center discourage patients from following a low salicylate diet.

    1. Thanks for your insightful comments Andrea. This is a great example of how difficult randomized controlled trials are when it comes to diet.

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