Got this in my inbox today:
Q: Is there a link between hcg and cancer?
A: Yes. One link between hcg cancer is that certain cancers produce hcg in the body and therefore, hcg is used as a measure of how the cancer is progressing and the type of cancer involved. In this case the cancer causes the hcg, the hcg does not cause cancer.
Q: Does hcg cause cancer?
A: The research that I have read disputes the assertion that hcg cause cancer but it may aggravate pre-existing ovarian cancer so that is a contraindication. It has been shown in multiple studies to have protective attributes against certain types of breast cancer. Women who have been exposed to very high levels of hcg over the course of a pregnancy (thousands of times greater than with hcg injections during the hcg diet) tend to have much lower breast cancer rates than women who have never been pregnant.
Most practitioners consider a glandular cancer (breast, ovary, uterus, prostate, hypothalamus, or pituitary gland) a contraindication for hcg injections because it is not 100% clear the effect that hcg will have on these glands and no practitioner or company wants the liability involved and if the cancer coincidentally reoccurs while taking hcg, it is easy to blame it on anything the patient is taking at the time.