Keto diet and cancer: What recent research reveals?

The ketogenic diet, commonly referred to as keto diet, has become a popular method for weight loss, boosting energy, and managing specific health conditions. It emphasizes high fat intake while severely limiting carbohydrates, pushing the body to convert from glucose to fat as its initial energy source. While the diet has created interest for its short-term advantages , latest scientific research has raised questions about its long-term risks, especially regarding cancer.

Investigating the connection between keto and cancer

A team of researchers from China examined data from the U.S. National Health and Nutrition Examination Survey (NHANES), a huge, ongoing research that collected dietary and health data from 2001 to 2018. Their focus was to analyze whether following a ketogenic eating habit is connected to cancer risk. The outcome of their analysis was published in Nutrition and Cancer.

Nearly 44,000 participants of age 20 and older met the criteria for inclusion in this analysis. The group was roughly balanced between men and women, although women were slightly more represented. Dietary intake was examined using the average of two 24-hour dietary recalls, which enabled researchers to calculate each participant’s Dietary Ketogenic Ratio (DKR). This estimates the probability of being in a state of ketosis regarding the balance of carbohydrates, fats, and protein in their diet.


Ketosis happens when carbohydrate intake is low, initiating the body to use fat as an energy source. The liver transforms fat into ketone bodies, which can serve as an alternative method for cells. Participants were sorted into four quartiles as per DKR, with Q4 showing the highest likelihood of ketosis and Q1 the lowest.The study found a consistent pattern: as the DKR increased, the risk of cancer across all types, not just specific forms of the disease.

Causes behind the observed effects

Although researchers acknowledge that a ketogenic diet may provide some short-term advantages, the long-term risks may outweigh the benefits. The question of why keto may increase cancer risk needs to be explored more, but researchers provide a few possible citations. Initially, they note that ketones have been implicated in enhancing the oxidative stress, resulting in cellular damage, which elevates the risk of cancer. They also note that while cancer cells prefer to use glucose as an energy source, research cites that some cancer cells can utilize ketones as an alternative energy source to survive and proliferate. This study mentions a link between the ketogenic diet and cancer. While keto could aid you lose weight, the challenges may outweigh the advantages.

In addition to these findings, the study also revealed that intensified ketosis was linked with a significant reduction in the body’s antioxidant defenses. Specifically, the levels of vitamins A, C, and E, along with major trace minerals such as manganese, zinc, and selenium, showed reduced activity. This analysis supports previous research showing that deficiencies in these antioxidants and micronutrients can really elevate the risk of developing different forms of cancer.

FAQs:

1. What is the ketogenic (keto) diet?
A diet high in fats, moderate in protein, and very low in carbohydrates, which shifts the body into ketosis.

2. How is the keto diet linked to cancer?
Research suggests high ketogenic ratios may increase oxidative stress and provide alternative energy for some cancer cells, raising risk.