Feb 19, 2015 Hordenine -10grams | Eurovet Supply Hordenine is a dietary supplement ingredient related to tyramine, found naturally in grains such as sprouting barley. Hordenine is said to support mental and physical energy and a positive mood. Hordenine is also known to help activate Phenylethylamine (PEA), due to it's hypothesized action as a weak reversible MAO-B inhibitor. Hordenine has been used in supplement products which may support maintaining healthy energy, mood and weight. More information about hordenine can be found at Hordenine - Wikipedia, the free encyclopedia.