Spinach is an annual plant that grows up to 30 cm tall, with alternate, simple leaves that are ovate to triangular in shape and vary in size from 2-30 cm long and 1-15 cm broad. Spinach provides many health benefits such as being nutrient-dense, promoting gastrointestinal and brain health, and protecting eyes. However, spinach can also cause kidney stone issues, teeth grittiness due to oxalic acid, and upset stomach from its high fiber content.