A single dose of L-Theanine reduced the reaction time to attention tasks.  Those who took L-Theanine had an increased number of correct answers on working memory tasks, providing evidence that it can improve attention and enhance working memory and executive functions.

L-theanine has the unique ability to reduce anxiety and make stressful situations more manageable. It achieves this through the rebalance of brain neurotransmitters which communicate information between nerve cells. 

Magnesium is an essential mineral critical for our muscle and nerve functions. Whereas calcium contracts, magnesium relaxes.  Regardless of which of the above factors is contributing to your constipation, a highly absorbable form of this mineral can be a very effective way to get a tight bowel to relax and re-establish your regularity.