Comparing Oatly directly to dairy cow milk reveals distinct nutritional trade-offs rather than a definitive superior option. Dairy milk naturally provides a complete profile of high-quality protein, calcium, and essential amino acids without added sugars or industrial seed oils. Oatly matches or exceeds dairy in terms of added fortification like calcium and vitamins, and it is entirely free of animal fats and lactose, making it ideal for vegans or the lactose intolerant. However, standard oat milk typically features higher carbohydrate content and lower natural protein levels unless fortified by the manufacturer.