The traditional Atlantic diet of northwestern Spain and Portugal consists of local, fresh, minimally processed seasonal foods such as vegetables, fruits, whole grains, beans, and olive oil, along with high consumption of fish and other seafood. It shares similarities with the Mediterranean diet and has been linked to improved metabolic risk factors as well as environmental benefits. The Galicia Atlantic Diet (GALIAT) study set out to assess the effects of the traditional Atlantic diet on the metabolic health and dietary habits of families in Spain: Two hundred fifty families—a total of 574 people—from a community in northern Spain were randomized either to the Atlantic diet intervention group or to the control group. (A family was defined as 2 or more
