Causes. Giardia parasites live in the intestines of people and animals. Before the microscopic parasites are passed in stool, they become encased within hard shells called cysts, which allows them to survive outside the intestines for months.Once inside a host, the cysts dissolve and the parasites are released.auses. Giardia parasites live in the intestines of people and animals. Before the microscopic parasites are passed in stool, they become encased within hard shells called cysts, which allows them to survive outside the intestines for months.
On the other hand, those people who eat a lot of processed foods, and/or non-organic foods are susceptible to developing these health issues due to GMOs. For example, about 90% of the corn and soy in the United States is genetically modified. And a lot of processed foods have corn and soy ingredients.
Overview. 1  Genetically modified organisms, or GMOs, are commonly used in foods and medicines. 2  Medicines and vaccines produced through GMO means include insulin, thyroid hormones and the hepatitis B vaccine, according to the University of California San Diego. 3  Many food additives are also produced using GMOs. Some of the more commonly known examples are aspartame and yeast. However, many other types of additives you see near the end of ingredient lists can also be produced using GMOs.