In addition to being healthy, pumpkin also contains another healthy ingredient, that is pepitas, or pumpkin seeds. Pepitas are very rich in minerals such as zinc, magnesium and iron. They are also high in protein content, about 20%. Unfortunately, like many other nuts and seeds, pepitas contain anti-nutrients like phytic acid, or phytate, that can make all the previously discussed important nutrients less bioavailable when you consume them. These anti-nutrients bind to minerals, especially zinc and iron, and the minerals cannot be absorbed.
I found a study that was specifically designed to research this factor in pumpkin seeds. It concluded, ‘The subsequent digestion under intestinal conditions showed that Zn becomes less accessible, indicating that antinutrients like naturally present phytate may be responsible for complex formation in the small intestines, thus reducing the potential for Zn bioavailability.’ (Food Chemistry, Volume 128, Issue 4, 15 October 2011, Pages 839-846)
So, if you plan on consuming seeds or nuts on a regular basis, it would be wise to soak or sprout them, that is what doctors advise. Unfortunately, ‘the soaking of whole seeds for 24 h can lead to leaching of iron and, to a lesser extent, of zinc ions into the soaking medium.’ The same applies to all legumes and grains. The good news, it was also proved that fermentation can completely hydrolyze the phytic acid. (Food Chemistry, Volume 138, Issue 1, 1 May 2013, Pages 430-436) And by the way, the heating also causes phytic acid reduction.