Are Thistles Nutritious? Uncovering the Wild Weed's Hidden Health Benefits
                                
                                
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                                    4 min read                                
                            
                                Canadian thistle can contain up to 27% protein when young, a nutritional value comparable to alfalfa. The answer to the question, "Are thistles nutritious?" is a surprising yes, as many edible varieties contain essential vitamins, minerals, and antioxidants.