> But the researchers recognize that their findings are purely observational at this stage and cannot prove a cause and effect of eating too little or too many

> But the researchers recognize that their findings are purely observational at this stage and cannot prove a cause and effect of eating too little or too many carbohydrates. Title of the article - "Low and high carb diets increase risk of early death, study finds" Not saying this study isn't worth reporting and reading, but they could have titled it better.