You’ve heard the rumors.

👉 “It’s not real coffee.”
👉 “It tastes like dirt.”
👉 “It doesn’t work.”
👉 “It's just a trend.”

Well... that might be true for some mushroom coffees. But NOT this one.

Not all mushroom coffees are created equal. It's easy to pick a seemingly beneficial mushroom coffee that is full of fillers and ineffective ingredients. But don’t worry! We've been crafting real, effective mushroom coffee for over 10 years.

Meet the Mushroom Coffee That Changed the Game

The Original Mushroom Coffee from Four Sigmatic — the #1 mushroom coffee brand in the U.S.* 

(*SPINS Total US Natural L52)

❌ Rumor: Mushroom coffee isn’t “real” coffee

✅ Truth: We use premium Arabica coffee (very real)

No mud. No faux-coffee powder. Just premium Arabica beans. We source USDA organic beans straight from a small, family-run co-op. These premium beans travel from Honduras and Peru to be roasted by our partners in the US before combining with supplement-level doses of mushrooms (aka 500 mg of fruiting body extracts at a 6:1 extract ratio).

☕ 100% real, rich coffee taste
🌱 Sustainably sourced, always organic
🧠 Infused with 5 functional mushrooms

Other brands use poor-quality coffee extract—or worse, no coffee at all. That’s why they taste like "a hot compost pile" (as described by one mushroom coffee drinker before trying Four Sigmatic). 

Enjoy deliciously roasted organic Arabica coffee beans in every sip of Four Sigmatic mushroom coffee.

❌ Rumor: Mushroom coffee doesn’t “do anything”

✅ Truth: Most brands don’t use real mushrooms

A study on reishi mushrooms found that 74% of products claiming to contain reishi... didn’t contain ANY reishi mushrooms. (Read the study here.) 

Yep. You read that right. You may have tried a "mushroom coffee" that didn't contain any real functional mushrooms. Hence, no benefits...

The FDA defines a mushroom as the visible, above-ground structure of a fungus that produces spores (AKA the fruiting body). It's what you're picturing when you think of a mushroom: the cap and stem. (See, you know real mushrooms better than most mushroom coffee brands!)

Unfortunately, it's a lot cheaper to use mycelium, the part of the mushroom that resembles a root system. This part of the mushroom has significantly less of the bioactive compounds responsible for the benefits. 

🚨 Mushroom coffee with mycelium almost always means lots of fillers!

This is because mycelium is grown on grains, most commonly rice or oats. When processed, the substrate (what the mycelium is growing on) is ground up with the mycelium. Products selling mycelium can be up to 90-95% grain! Don’t be fooled by paying for expensive oats when you intend to get the powerful benefits of fruiting bodies. 

🍄 Fruiting body = cap + stem = the good stuff
⚠️ Mycelium = roots = mostly filler

Here is our team inspecting a real Four Sigmatic reishi fruiting body mushroom. (We promise no mushrooms are licked in the making of Four Sigmatic mushroom coffee. We kept this one for ourselves 😉)

Real Mushrooms Have Research-Backed Benefits

Functional mushrooms can supercharge focus, ignite energy, boost your mood, and reduce stress. And there are hundreds of studies and thousands of years of use cases to prove it.

• Lion’s mane is one of the most popular functional mushrooms. It's renowned for improving focus and supporting a clear mind. One study shows that 250 mg of lion's mane taken 3x a day, significantly supported cognition in just 4 months*.
• It’s not just lion’s mane! Chaga is another powerful mushroom. It works like an internal anti-aging serum with about 1,300x more antioxidants than blueberries.
• In a study on chronic fatigue syndrome, reishi mushrooms helped reduce fatigue markers.* 
• Cordyceps is a favorite among Olympic athletes. Research on cordyceps mushrooms shows it can improve VO2 max. The benefits of functional mushrooms are almost endless.

Five Functional Mushrooms That Power Every Cup:

The Original Mushroom Coffee combines our favorite functional mushrooms for a powerful, benefit-packed brew.

But wait, there's more! We also added:
✔️ Vitamin B12 for energy
✔️ Probiotics (500 million CFUs of heat-stable probiotics)
✔️ Yacon root full of prebiotic gut support

 If you're ready for a supercharged coffee 👉 check out The Original Mushroom Coffee (packed with all 5 beneficial functional mushrooms)

❌ Rumor: You won't feel the mushroom benefits

✅ Truth: If it's not extracted, it's not bioavailable

There's one other reason you may have tried mushroom coffee and felt zero benefits. If the mushrooms are not extracted (aka made bioavailable), your body can’t absorb the benefits.

Extracting mushrooms breaks down chitin, a tough compound found in their cell walls (similar to what you'd find in shrimp, lobster, or crab shells). This allows the beneficial compounds to be bioavailable to your body. 

✅ Four Sigmatic uses 100% fruiting body, dual-extracted mushrooms.
❌ Many other brands? Sell you sawdust and hope you don’t read the label.

ALWAYS look for the word "extract" on the Supplement Fact Label when buying functional mushrooms.

Take a look at our label! On our Focus Ground Coffee (and every Four Sigmatic product) you can see all our functional mushrooms are extracted. So you'll actually get all the shroomy benefits!

You'll feel the benefits (guaranteed)!

Still unconvinced? Get the facts from real buyers:

9 in 10 Four Sigmatic buyers say it works.

And they’re not quiet about it. Our products are carefully crafted to ensure you're getting a quality, effective product. Our mushrooms are:

• Extracted (aka bioavailable so you can actually absorb the benefits)
• Only fruiting bodies (the part of the mushroom with the most bioactive compounds)
• Grown on trees (not cheap substrates, stripped of nutrients in a lab)
• Effective doses (at least 500mg of extracted functional mushrooms in every serving with a 6:1 extract ratio)

When you try Four Sigmatic mushroom coffee with real mushrooms, premium Arabica coffee, and potent benefits, you feel the difference. Here are the facts to back it up:

📈 #1 ranked by our buyers for taste & efficacy vs. buyers of competitive products*

❤️ 94% of Four Sigmatic buyers say they plan on buying again*

⭐ 100k+ five-star reviews from real customers

(*Source: Mindsight Brand Health Study 2024)

And if you’re still uncertain–try it out risk-free! We have a 💸 money-back guarantee. 💸 That’s just how confident we are that you’ll love the taste and feel the difference.

Better Taste. Better Ingredients. Better Results. Shop the Original Mushroom Coffee from the brand that started it all — and keeps doing it best.

👉 Order now and sip smarter

❌ Rumor: Four Sigmatic is just hopping on a trend

✅ Truth: We started the trend. Back in 2012.

Before “mushroom coffee” was a hashtag, we were making it in our kitchens.

Founder Tero Isokauppila grew up foraging mushrooms on his 13th-generation family farm in Finland — the coffee capital of the world (seriously, Finns drink more coffee per person than anywhere else). Inspired by WWII-era mushroom brews, he created the first-ever Four Sigmatic Mushroom Coffee.

We launched in 2012, dropped the first mushroom coffee in 2015, and have since sold...

☕ Over 200 MILLION cups.
#1 on Amazon. #1 at Whole Foods. #1 in the game.

This isn’t a trend. It’s a 13-year obsession.