For centuries, the entire milk thistle plant (sans thorns) has been cultivated for food, most notably in European monastery gardens.
The plant contains compounds collectively known as silymarin, which are toxic to livestock but provide the modern emergency antidote to mushroom poisoning in people.
These seeds are pleasant tasting and a good source of protein and amino acids.
The powdered form is a convenient way to enjoy this herb in smoothies, yogurt and other foods.