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The EJCN has launched a special category of paper that is aimed at stimulating nutrition research, and driving the future nutrition agenda. Internationally respected authors have been invited to express their thoughts in a ‘free form’ perspective, which allows them the scope to inform, critique and stimulate nutrition science. Each invited paper will strive to provide a synopsis of the findings on the topic to date, critically examine the shortcomings, and provide some food-for-thought towards newer research questions.