Research Highlights: A study of over 20,000 adults found that those who followed an 8-hour time-restricted eating schedule, a type of intermittent fasting, had a 91% higher risk of death from cardiovascular disease. People with heart disease or cancer ...
I agree more and better data is good. If this is repeated or a similar study is done and the same results are in, then I would start to evaluate.
Lots of studies also show that moderate induced stress (fasting, cold plunges, saunas) do indeed cause helpful changes, but studying humans is so complicated that we could still be wrong.
There’s no point repeating it. This kind of study is hopeless for answering this sort of question. People go on this kind of diet because they’re concerned about their health, often their weight and general cardiovascular health. It’s not surprising that they’re more likely to die of things related to their reason for going on the diet in the first place.
It’s not quite as starkly obvious as “people who choose to jump out of planes are more likely to die in a parachute accident” but it’s close.