Four Sigmatic Mushroom Elixir Mix with Reishi - Help yourself find relaxation and support your body’s sleep with the calming effects of the Reishi mushroom - one of the world’s most researched ingredients. Mushrooms are the original superfood and Four Sigmatic uses log-grown red reishi mushroom fruiting bodies that are rigorously tested for purity. Simply mix, drink and chill with these convenient individual packets.