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Food composition data are essential to food-based nutrition work. It is therefore important that professionals involved in nutrition are able to understand and use food composition data. This short video presents testimonials from professional working in very different areas related to food-based nutrition and agriculture development in general, illustrating the many areas and ways in which food composition are instrumental, and provides an introduction of the FAO/INFOODS e-learning course on food composition data. Learn more on www.fao.org/nutrition/food-composition.