Reishi mushroom is one of the most famous and highly revered tonic herbs and adaptogens of all time. Reishi mushrooms have been used for thousands of years as a superfood fungus and to strengthen the immune system, reduce stress, increase energy, and promote healthy ageing and longevity. Reishi mushroom is regarded as the best 'spirit elevating' (Shen) tonics that may positively promote mental well-being health benefits, calmness, and help cultivate more peace, love and happiness in one's life.