Soak pot roast in vinegar and water for ... onions in the roast bag along with the roast. Cook for 1 hour or until meat is tender and thoroughly cooked.
1 Foods that are high in protein are often high in lysine. 2  However, too much protein may interfere with tryptophan in the bloodstream, an important precursor to serotonin. 3  Lysine-rich foods include meat, cheese, fish, nuts, eggs, soybeans, spirulina, and fenugreek.erotonin is a neurotransmitter, or chemical in your body that relays messages to your brain. The brain produces serotonin by combining tryptophan hydroxylase and tryptophan to form 5-hydroxytryptamine (i.e., serotonin). Almost 90% of your bodyâs serotonin supply is located in the digestive system and blood platelets.
The synthesis of serotonin is similar in some ways to the synthesis of dopamine and norepinephrine. Tryptophan is also the precursor to serotonin.Tryptophan is taken up by serotonergic neurons in restricted brain areas such as the raphe nucleus.ther research has found that long-term use of methamphetamine may decrease serotonin levels (Seiden et al., 1975/1976). Introducing methamphetamines into the serotonergic neurons may eventually disrupt the synthesis and release of serotonin into the synaptic cleft.