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Untreated phenylketonuria can cause severe and irreversible mental retardation. People with phenylketonuria must avoid phenylalanine and take must regularly take tyrosine supplements. Animal sources of phenylalanine include meat, fish, milk, yogurt, eggs and cheese. Aspartame is a methyl ester of phenylalanine dipeptide. Nuts, lima beans, pumpkin and sesame seeds and various soy products are rich plant sources of phenylalanine. Of two phenylalanine enantiomers which demonstrate different biological effects, D is not present in natural products, but is made artificially.

In traditional medicine strychnine is used for various purposes, as appetite stimulant, for the treatment of heartburns, insomnia, migraines or constipation. In constipation treatment strychnine activates peristalsis by acting on a neuro-muscular junction in bowel. By affecting vagus nerve strychnine increases hart rate, and sharpens all senses, for what it is considered as a general stimulant. As such, strychnine was often used for doping in sports and in very small concentrations it is added to some energy drinks.

2. Nabilone. ) is a very old tree indigenous to Chine that is believed to have survived the glace age. The fossils of ginkgo 270 million years old have been discovered and several ginkgo trees survived Hiroshima nuclear blast in 1945. The tree produces nut-like seeds that are highly appreciated in Asiatic cuisine and are believed to have aphrodisiac properties. 3) produced by tree leaves inhibit platelet-aggregating factor (PAF) (Leistner and Drewke, 2010). PAF in addition to its effects on blood platelets causes bronchoconstriction, cutaneous vasodilatation, hypotension, and releases inflammatory mediators in the body.

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