Ultraprocessed Foods and Cancer: Small Substitutions May Lower Risk

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Ultraprocessed Foods and Cancer: Small Substitutions May Lower Risk

Processed and ultraprocessed food consumption has been shown to increase the risk for various cancers. A new analysis suggests that replacing even a small amount of such foods with an equal amount of minimally processed options may reduce that risk.

Using data from more than 450,000 participants, the dietary substitution analysis found that swapping out just 10% of processed foods with minimally processed foods significantly lowered the risk for cancer overall by 4% as well as the risk for several cancer types, including esophageal squamous cell carcinoma by 43% and hepatocellular carcinoma by 23%.

Making this substitution with ultraprocessed foods also appeared to lower cancer risk but often to a lesser degree. For instance, swapping 10% of ultraprocessed foods for minimally processed foods lowered the overall cancer risk by just 1%, the risk of hepatocellular carcinoma by 27%, and the risk of esophageal squamous cell carcinoma by 20%.

Overall, “this study suggests that the replacement of processed and ultra-processed foods and drinks with an equal amount of minimally processed foods might reduce the risk of various cancer types,” Nathalie Kliemann, PhD, from the WHO’s International Agency for Research on Cancer, Lyon, France, and colleagues concluded.

The findings were published in the March issue of The Lancet Planetary Health.

This study “is the largest study investigating these associations between food processing and cancer risk and therefore has greater power to detect differences in populations, potentially explaining why we found overall more significant results for different cancer sites than other cohorts,” Kliemann and colleagues write.

Lancet Planet Health. Published in the March 2023 issue. Full text

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