Placenta

The placenta secretes progesterone and high levels of estrogen. It also contains high concentrations of diamine oxidase, an enzyme that breaks down histamine.

In a randomized, double blind, controlled trial, injections of subcutaneous human placental extract were found to improve symptoms in Chronic fatigue syndrome patients. [https://www.jstage.jst.go.jp/article/bpb/advpub/0/advpub_b15-00623/_article Human Placental Extract as a Subcutaneous Injection is effective in Chronic Fatigue Syndrome. A Multi-center, Double-Blind, Randomized, Placebo-Controlled Study], Biological and Pharmaceutical Bulletin