A study some keto fans pointed to as proof the diet doesn't harm arteries is now officially off the record. The Journal of the American College of Cardiology: Advances has retracted an April 2025 paper that claimed plaque buildup seen in 100 people on ketogenic diets was unrelated to the low-carb, high-fat meals they were eating. Scientists had questioned the paper from the start, citing selective data reporting, shaky statistical methods, and tiny control groups, Retraction Watch reports. One researcher previously told Wired the situation was "a collective mess," complicated by co-author and tech entrepreneur Dave Feldman's large online following and lack of medical training.
Co-author Nicholas Norwitz, a physician with Harvard and Oxford credentials, now says he and Feldman requested the retraction after a "deeper analysis" uncovered "a number of anomalies." He claims he didn't have access to the raw data until after publication "to protect the integrity of the process" and only later realized irregularities. Despite the setback, Norwitz and Feldman continue to promote their keto-focused work and have already posted a new preprint based on the same dataset, per Gizmodo. One doctor tells Retraction Watch that "the re-framing of the same data as confirming the original story is, in my view, more advocacy than science." Other studies have linked the keto diet to increased levels of "bad" cholesterol and a higher risk of heart disease.
,
uBlock 
,
and
Ghostery 
)
