Consuming nuts less likely to develop heart disease and cancer
Norway,Dec6:“People consuming at least 20 grams of nuts daily less likely to develop potentially fatal conditions such as heart disease and cancer,” The Independent reports. That was the main finding of a review looking at 20 previous studies on the benefits of nuts.
Researchers found consistent evidence that a 28 gram daily serving of nuts – which is literally a handful (for most nuts) – was linked with around 20% reduced risk of heart disease, cancer and death from any cause.
However, as is so often the case with studies into diet and health, the researchers cannot prove nuts are the sole cause of these outcomes.
It’s hard to discount the possibility that nuts could be just one component of a healthier lifestyle pattern, including balanced diet and regular physical activity. It could be this overall picture that is reducing risk, not just nuts.
The researchers tried to account for these types of variables, but such accounting is always going to be an exercise in educated guesswork.
Also, many non-lifestyle factors may be involved in any individual’s risk of disease. For example, if you are a male with a family history of heart disease, a healthy diet including nuts can help, but still may not be able to eliminate the risk entirely.
The link between nuts and improved health is nevertheless plausible. As we pointed out during a discussion of a similar study in 2015: “Nuts are a good source of healthy unsaturated fats, protein, and a range of vitamins and minerals … Unsalted nuts are the healthiest option.”
The study was carried out by researchers from Norwegian University of Science and Technology, Trondheim, Norway, Imperial College London, and other institutions in the US.
It was funded by Olav og Gerd Meidel Raagholt’s Stiftelse for Medisinsk forskning (a Norwegian charitable foundation), the Liaison Committee between the Central Norway Regional Health Authority and the Norwegian University of Science and Technology (NTNU), and Imperial College National Institute of Health Research (NIHR) Biomedical Research Centre (BRC).
The study was published in the peer reviewed medical journal BMC Medicine on an open-access basis, so it is free to read online.
The UK media presents the results reliably but without discussing the inherent potential limitations of the type of observational evidence examined by the researchers.