[Editorial] An EAT special

Our current food system is a major source of environmental degradation and, despite producing enough annually to feed the entire world population, it leaves more than 8% of people undernourished, while in wealthier countries overnutrition and poor-quality diets are leading contributors to the burden of disease. The 2019 EAT-Lancet Commission recognised the importance of food as a leaver to improve human health while tackling global environmental threats. Since that first publication of a flexitarian Planetary Health Diet (PHD), recommending less animal sourced, highly processed, and sugary foods, and more fruits, vegetables, pulses, and wholegrains, key questions have arisen about its nutritional adequacy, affordability, and how an effective and just food transition might come about.