What Plant Is Oats Made Of? Uncovering the Cereal's Origins
                                
                                
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                                    4 min read                                
                            
                                Archaeological evidence suggests that oats were processed for food by hunter-gatherers as far back as 32,000 BCE, long before they were deliberately cultivated. So, what plant is oats made of that has been a staple for millennia? The answer lies in the cereal grain of a grass plant scientifically known as *Avena sativa*.