Tea has been very effective in assisting with mental health. In addition to creating a calmer, alert state of mind, tea lowers your chance of experiencing a cognitive impairment. It also reduces stress hormone levels, eases irritability, headaches, anxiety and insomnia. Tea can also give you a temporary boost in your short term memory. Research through various studies has verified these claims with both green and red teas proving to provide some of these benefits in addition to other varieties of tea.