L-theanine is an amino acid. While more research is necessary, possible benefits include managing anxiety, relieving stress, and reducing insomnia. L-theanine is primarily found in green and black tea ...

Older people are more likely to develop Parkinson's, especially those over age 60. Parkinson’s disease is difficult to treat, and there is no cure, but a timely diagnosis can help manage the condition ...

In the United States, flu season typically lasts from October to May. The flu virus affects people of all ages each year, and symptoms include coughing, runny nose, fever, chills, body aches, and ...

Editors and writers independently select products unless marked Sponsored or Promoted. Sponsored content is a paid ad, while content marked Promoted is chosen by Ziff Davis leadership. We may earn an ...

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Mary Hall is a editor for Investopedia's Advisor Insights, in addition to being the editor of several books and doctoral papers. Mary received her bachelor's in English from Kent State University with ...