Unlike other plant milks having origins as early as the 13th century,[4] oat milk was developed in the 1990s by the Swedish scientist Rickard Öste.[2][6] Over 2017–2019, oat milk sales in the United States increased 10 fold,[4] and one major manufacturer, Oatly, reported a three-fold increase in worldwide sales.[7] By 2019, oat milk products included coffee creamer, yogurt, and ice cream.[7][8] Oat milk may be consumed to replace dairy milk in vegan diets, or in cases of medical conditions where dairy is incompatible, such as lactose intolerance or an allergy to cow milk.[5][9] Compared to dairy milk and other vegan milk products, oat milk has relatively low environmental impact due to its comparatively low land and water needs for production.[9][10]