Pumpkin seeds contain fatty oils with linoleic acid and oleic acid, both known to prevent cancer-causing cell production. They are also an excellent source of vitamins A, B6 and C. In addition, the seeds contain beneficial nutrients like zinc, magnesium, calcium and iron. Perhaps most important to those suffering from hair loss, the seeds contain cucurbitin, a unique amino that may be responsible for pumpkin seeds’ effects on hair growth. There is conjecture that when consumed internally pumpkin seed oil it is a DHT blocker and can aid in treating baldness or hair loss, though no clinical study has been done.