Nutrition research, explained
One study a day, read from the primary source: what was found, how strong the evidence is, and what it means for you. On days without a solid new study, we explain an important older one instead.
Ultra-processed food is linked to higher risk of seven chronic conditions in a study of 8.8 million adults
A new meta-analysis of 51 cohorts ties ultra-processed food to heart disease, diabetes, depression and earlier death. The evidence is consistent but rated low to moderate.
Eating 25-29 g of fiber a day is linked to lower risk of heart disease, diabetes and early death
A WHO-commissioned review of 185 cohort studies and 58 trials remains the clearest evidence on how much fiber to aim for.
A Mediterranean diet with extra olive oil or nuts cut major heart events by about 30% in a large trial
What the PREDIMED trial found, why it was republished in 2018, and what it means for your shopping list.
Each extra 200 g of fruit and vegetables a day is linked to about 10% lower risk of early death
A dose-response meta-analysis of 95 studies suggests the benefit keeps rising up to about 800 g a day.