Health & Wellbeing Enhancing Superfoods. Enhance and support your everyday routines with Four Sigmatic superfoods. Four Sigmatic foods are the most nutrient-dense, most studied foods on the planet. Only 100 foods fall into this category and these are the foods you’ll find in the Four Sigmatic collection; things like coffee, green tea, hemp, cacao, coconut, ashwagandha, and lesser-known adaptogens like Reishi and Cordyceps.