Someone recently said they had great results for their husband from theanine. I did a medical research on it for PD and found zero articles, which is strange. Almost every nutrient has some research for it in relation to PD, for or against, especially something as common as an amino acid like theanine. Even stranger is that it is probably 3rd after caffeine as the most important compound in green and black tea. That's strange because green and black tea are second to only nicotine and coffee in terms of evidence in preventing PD. And no researchers have thought to check theanine? Makes me go hmmm. I'm sorry, I'm testing wine today.