Brand profile
Four Sigmatic is a functional mushroom brand founded by Finnish entrepreneur Tero Isokauppila, who describes himself as a 13th-generation farmer, together with a team of fellow Finns. After launching its mushroom coffee, the company moved from Finland to California and says it put down roots in Venice, CA. Its range includes ground and instant mushroom coffees, coffee pods, lattes, creamers, protein coffee and matcha, sold online, on Amazon and in stores such as Whole Foods and Sprouts.
Average score
Across 1 product
Testing & quality
Markets its coffees as USDA Organic and "tested for toxins"; no named third-party certification was found.
Four Sigmatic
Real organic dark-roast coffee (about 150 mg caffeine per cup) with 250 mg each of lion's mane and chaga; tastes like coffee, but mushroom doses are modest.
Video reviews