Pumpkin seeds contain a wide variety of antioxidant phytonutrients, including the phenolic acids hydroxybenzoic, caffeic, coumaric, ferulic, sinapic, protocatechuic, vanillic, and syringic acid; and the lignans pinoresinol, medioresinol, and lariciresinol. Pumpkins seeds also contain health-supportive phytosterols, including beta-sitosterol, sitostanol, and avenasterol. Pumpkin seeds are a very good source of phosphorus, magnesium, manganese, and copper. They are also a good source of other minerals including zinc and iron. In addition, pumpkin seeds are a good source of protein.