Poor diet may be behind millions of heart deaths each year — but the good news is we’re getting better at avoiding them.

Other research confirms that diets low in nuts, whole grains, and fruit, and high in salt, are tied to about 4 million heart disease deaths each year — though another study found the number is actually more than double that. As for the 44% drop in death rates since 1990, that’s accurate for high-income countries, but globally, the drop is closer to 30%, meaning the claim paints an overly optimistic picture of the world as a whole. The post’s link doesn’t lead to the study it cites, so we’re relying on other large-scale analyses to check the numbers.

Small diet changes really do matter, but the full picture is more complicated than the post lets on.