By now there have been 6,283 deaths in the ARIC group but the study in The Lancet Public Health also looked at more than 400,000 people in other studies.
Those who had the lowest risk of mortality (death) from all causes were the ones who got about half of their calories from carbohydrates.
BOTH low carb <40% and high carb >70% diets resulted in greater risk of early death.
In addition, if the carbs were replaced by animal fat or animal protein the risk was also higher but if the carbs were replaced by plant-based oils or protein.
The study was recently published in The Lancet Public Health which is available online.