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Four Sigmatic Focus Ground Coffee — view 1 of 5
Four Sigmatic

FOUR SIGMATIC Organic Focus Mushroom Ground Coffee, 12 OZ

4.4· 20,499 Amazon reviews
$17.62$17.09with Subscribe & Save

$1.47/serving

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Price verified Apr 22, 2026

Not evaluated by the FDA · Individual results may vary · Consult a healthcare provider before use

Our verdict

250mg Lion's Mane + 250mg Chaga fruiting body per serving of Lion's Mane + Chaga per ground coffee from Four Sigmatic. Best for overall best mushroom coffee — flagship product…

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Why we recommend this

The category-defining mushroom coffee product with unmatched social proof — 20K+ reviews at 4.4 stars — and transparent sourcing from a single Honduran co-op. Lion's Mane + Chaga at 250mg each meets traditional-use ranges.

Check for interactions

Already taking other supplements or prescription medications? Add them below to check for documented interactions, severity, and clinical guidance.

Our database currently documents 137+ supplement and drug-category interaction pairs. Combinations not flagged here may still interact — always consult your healthcare provider before combining supplements, especially with prescription medications.

What to watch out for

Two-mushroom formula is narrower than blends with 5-10 mushroom species, and the price runs about 2x conventional organic ground coffee.

Dose & form

Serving
250mg Lion's Mane + 250mg Chaga fruiting body per serving
Form
Ground Coffee
Clinical range
1-2 cups daily (250-1500mg mushroom extract per serving)
Dose adequacy
Therapeutic
Supply
12 servings · $1.47/serving
UPC
816897024322

Who it's best for

Overall best mushroom coffee — flagship product with 20,499+ reviews and the highest bestseller rank in the category

Who should skip it

Drinkers who prefer pre-portioned single-serve pods over drip-brew grounds

Pros

  • 250mg each Lion's Mane + Chaga (fruiting bodies, not mycelium)
  • Single-origin Marcala Honduras beans grown at 5,500 ft elevation
  • #5 in Amazon Ground Coffee category with 20,499+ reviews
  • USDA Organic and Fair Trade certified

Cons

  • Only 2 mushroom species (Lion's Mane + Chaga)
  • Higher price per cup than conventional ground coffee
  • Full 250mg caffeine — not a low-caffeine option

What customers say

4.4★ across 20,499 Amazon reviews. The most common questions from shoppers: re any potential interactions with medications, re any side effects from long-term use, and cause any digestive issues or side effects. Full answers in the FAQ below.

Frequently Asked Questions

What is the clinical dose for Lion's Mane + Chaga?

Clinical trials typically use 1-2 cups daily (250-1500mg mushroom extract per serving). Four Sigmatic Focus Ground Coffee delivers 250mg Lion's Mane + 250mg Chaga fruiting body per serving, which we classify as Therapeutic relative to that range.

How does Four Sigmatic Focus Ground Coffee compare to similar Ground Coffee?

See the "Also consider" section below for two alternatives. Choose based on form preference (Ground Coffee vs alternatives), dose adequacy, and third-party testing.

Is Four Sigmatic Focus Ground Coffee third-party tested?

Yes — USDA Organic, Fair Trade. Third-party testing verifies ingredient identity and label accuracy.

Does this work with Amazon Subscribe & Save?

Yes — Amazon Subscribe & Save is available for this product. Enrolling locks in a recurring delivery at a reduced per-unit price.

Are there any potential interactions with medications?

Lion's Mane may mildly affect blood sugar and blood clotting — consult your doctor if you're on diabetes medications or blood thinners. Chaga has moderate interaction potential with aspirin, warfarin, or other anticoagulants. The 250mg caffeine (standard cup) is well-tolerated alongside most medications.

Are there any side effects from long-term use?

Long-term use of Lion's Mane and Chaga at food-dose levels (250mg each) is well tolerated in clinical studies up to 16 weeks. Some users report mild digestive adjustment in the first week. Chaga's oxalate content can contribute to kidney stone risk in susceptible individuals over prolonged daily use.

Does it cause any digestive issues or side effects?

Mushroom fruiting bodies are gentle on digestion and less likely to cause upset than mycelium-on-grain products. A small fraction of users report mild bloating the first few days as gut flora adjusts. The 250mg caffeine matches regular coffee, so acid-reflux sensitivity is unchanged.

Can it be taken with other supplements or vitamins?

Yes — mushroom coffee combines well with most daily supplements. Avoid stacking with other stimulants (pre-workouts, caffeine pills) to keep total caffeine under 400mg/day. Fat-soluble vitamins (D, K, E, A) absorb better if taken with food later in the day, not coffee alone.

Are there any specific instructions for taking it safely?

Brew as regular ground coffee using 1-2 tbsp per 6oz water. Start with one cup daily to assess tolerance to mushrooms, then increase. Avoid drinking within 6 hours of bedtime due to caffeine content. Store airtight in a cool dry place after opening.

How long until benefits are typically experienced?

Focus and mental clarity effects from Lion's Mane typically emerge after 2-4 weeks of daily use, based on clinical studies using 250-1000mg dosing. Chaga's antioxidant benefits are cumulative. The caffeine effect is immediate like any coffee.

Also consider

Part of this guide

Best Mushroom Coffee

As an Amazon Associate, we earn from qualifying purchases. Some links below are affiliate links — this doesn't affect our editorial independence or product ratings. How we evaluate products

This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer