Japanese researchers recruited healthy University students and assessed their anxiety levels using the manifest anxiety scale (MAS). Students with high anxiety were put in one group, while students with minimal anxiety were put in another group. Both groups received water or water plus 200 mg of L-Theanine.

High blood pressure is more common and more deadly in African Americans than in Caucasian Americans representing thousands of additional deaths and strokes among people with darker skin. Researchers from the University of Rochester Medical Center analyzed data from almost 2000 African Americans and 5,100 Caucasian Americans over the age of 20. They compared systolic blood pressure and Vitamin D levels in the participants.

Chronic alcoholics suffer from a build up of fat in their liver. When alcohol is metabolized in the liver it churns out free radicals that can damage the power plants in each liver cell known as mitochondria. This prevents them from using sufficient amounts of oxygen to produce energy.