Dr. Raphael Cuomo, professor at the University of California at San Diego Medical School, I mentioned BeforeI noticed a fascinating essay he wrote. It is about "nutrition epidemiological risk - survival paradox", and for this, the term "Cuomo's Paradox" was also coined. There is also a good overview This YouTube video. All in all, there are health and nutrition recommendations to reduce the risk of access to diseases such as cardiovascular disease and certain types of cancer. But the paradox is that if you already have one of these diseases, these same suggestions may be taboo as they can now increase the risk of dying from the disease. Obesity is an important risk, and it is a risk factor. However, carrying some extra weight can be protective after you already have the disease.

Paper covers more evidence of such effects (such as the effects of alcohol and cholesterol). Dr. Cuomo cautiously points out that we may not have enough information to change health advice, but more research is certainly needed for this interesting paradox. Here is a link to the full text in the Journal of Nutrition.