Ben Greenfield Special
Ben Greenfield


"Been using Four Sigmatic for awhile now. I’m impressed by the efficacies of their mushroom products."

"They have helped me to lower stress and improve my sports performance. The most impressive part is still the flavour, which is much better than the name “mushroom drink” initially implies."

Ben Greenfield


Shop Ben Greenfield Favorites

Lightly sweet, dairy free, before bed treat to Chill.



High dose, caffeine free, pre-workout to Perform



High dose, caffeine free, add to coffee to Defend.



High dose, caffeine free, add to coffee to Think

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Caffeine free, add to coffee or smoothies to Defend

Reviews from people who don’t normally write reviews

“Reishi, lions mane,chaga and cordyceps mushrooms contain powerful properties”

Dr. Mark Hyman

Physician and New York Times bestselling author

Chelsea Yamase

Influencer, speaker & art director

Rich Roll

Ultra-endurance triathlete & author

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