Four Sigmatic is a real mushroom coffee and mushroom cocoa brand, and its Original Mushroom Coffee is an instant, half-caf coffee blend with 50 mg of caffeine per serving. It is designed for people who want a quick coffee ritual with mushroom extracts, but the best choice depends on whether you want instant convenience, its listed ingredients, and its price to fit your routine.
Four Sigmatic says its Original Mushroom Coffee contains organic Arabica instant coffee, lion’s mane, chaga, cordyceps, reishi, turkey tail, vitamin B12, and probiotics. Its product page describes caramel notes and a medium roast.
Independence note: This site is independent of this brand: it has no commercial relationship with it, is not paid by it, and has no purchase or affiliate links on this page.
- What it sells: Mushroom coffees, cocoa mixes, supplements, proteins, teas, and blends.
- Original Mushroom Coffee: Instant coffee, 30 servings, 50 mg caffeine per serving.
- Listed mushroom ingredients: Lion’s mane, chaga, cordyceps, reishi, and turkey tail.
- Brand promise: Focus, energy, stress support, and gut support.
- Return term: 60-day money-back guarantee, according to the brand’s product page.
What does Four Sigmatic sell?
Four Sigmatic sells mushroom coffee products, including ground coffee, instant coffee, pods, creamers, lattes, blends, capsules, and cocoa mixes. Its Original Mushroom Coffee is a 30-serving instant coffee product. The brand says to mix one tablespoon with 8 fluid ounces of hot water.
If you are comparing the coffee category rather than one product, our mushroom coffee comparison explains the practical differences among several formats. For a closer look at how ingredient lists can differ, see this ingredient comparison.
Does Four Sigmatic mushroom coffee have caffeine?
Yes. Four Sigmatic lists Original Mushroom Coffee as half-caf with 50 mg of caffeine per serving. That is the figure to use when deciding whether it fits your usual caffeine intake. The brand also lists decaf coffee options elsewhere in its range, but caffeine varies by product.
What is in Four Sigmatic Original Mushroom Coffee?
Four Sigmatic lists organic Arabica instant coffee plus lion’s mane, chaga, cordyceps, reishi, turkey tail, vitamin B12, and probiotics. The page says it uses fruiting body extracts rather than filler mycelium.
| Ingredient or feature | What it means |
|---|---|
| Organic Arabica instant coffee | The coffee base; the product is instant rather than whole bean or ground coffee. |
| Lion’s mane | A mushroom commonly sold in powders and extracts. Memorial Sloan Kettering notes its traditional use for general health and says supplements can interact with medicines. |
| Reishi | A mushroom used in capsules, powders, extracts, and teas. Memorial Sloan Kettering’s reishi guide describes its traditional uses and reported side effects. |
| Cordyceps | A fungus used in traditional Chinese medicine and sold in supplement forms. Memorial Sloan Kettering’s cordyceps guide discusses its forms and medication considerations. |
| Chaga and turkey tail | Additional mushrooms in the listed blend. |
What do doctors and studies say about mushroom coffee?
Mushroom coffee is still coffee first, with added mushroom ingredients. The supplied material does not include a Mayo Clinic statement about Four Sigmatic or mushroom coffee. For individual mushroom ingredients, Memorial Sloan Kettering describes traditional uses and notes that mushroom supplements are more concentrated than culinary mushrooms.
Research on a specific mushroom ingredient is not the same as research on a finished coffee blend. The National Center for Complementary and Integrative Health says scientific evidence for dietary supplements varies widely, and store-bought products can differ in important ways from products studied in research.
Does Four Sigmatic lower cortisol or prevent a coffee crash?
Four Sigmatic markets its coffee around focus, energy, stress support, and a smoother coffee experience. A cortisol result for Four Sigmatic’s finished coffee is not shown in the material here, so do not choose it specifically for lowering cortisol. Coffee can still be a trigger for some people; the NHS bloating guidance includes caffeine in coffee and tea among drinks to limit when bloating is a concern.
Does Four Sigmatic have heavy metals?
Four Sigmatic says its Original Mushroom Coffee is tested for toxins. A product-specific heavy-metals report is not included here. If this is central to your decision, ask the brand for the current third-party testing record that matches the exact product and lot you plan to buy.
What do Four Sigmatic products cost?
Prices below were shown on October 7, 2026; check the checkout for today’s price. Four Sigmatic listed Original Mushroom Coffee at $50.00 for a one-time 30-serving purchase, or $35.00 for a first subscription order. The brand says recurring subscriptions receive 20% off and can be cancelled any time.
| Product | Listed price | Listing details |
|---|---|---|
| Original Mushroom Coffee | $50.00 one time; $35.00 first subscription order | 30 servings; $1.67 per serving one time; $1.17 per serving for the first subscription order. |
| Calm Mushroom Cacao Mix | $14.48 | Amazon listing: 10 count; 4.3 stars from 5,214 reviews; about 700 sold monthly. |
| Calm Mushroom Cocoa Mix | $16.99 | Amazon listing: 15 servings; 4.3 stars from 208 reviews; about 500 sold monthly. |
| Boost Mushroom Cacao | $11.67 | Amazon listing: 10 packets; 4.1 stars from 822 reviews; about 100 sold monthly. |
Those Amazon ratings, review counts, and monthly-sales estimates are listing figures, not a quality verdict. Four Sigmatic’s product page also says orders ship within 24 hours Monday through Friday and offers a 60-day money-back guarantee.
Which Four Sigmatic drink tastes best?
Taste is personal, so there is no supported single “best” Four Sigmatic flavor. The brand describes Original Mushroom Coffee as medium roast with caramel notes. If you prefer cocoa, its Calm and Boost products are cacao mixes rather than coffee. Start with the format you already enjoy: coffee if you want a coffee routine, cocoa if you want a hot chocolate-style drink.
Can mushroom coffee cause side effects?
The answer depends on the product, the amount you drink, and your health situation. Original Mushroom Coffee contains 50 mg of caffeine per serving. For reishi, Memorial Sloan Kettering lists nausea, insomnia, and liver injury among reported side effects and says reishi may increase bleeding risk with blood thinners.
Safety note: If you take blood thinners, insulin, immunosuppressants, or other medicines, ask your clinician or pharmacist about the listed mushroom ingredients before using a mushroom supplement product.
Can mushroom coffee help with bloating?
Four Sigmatic markets Original Mushroom Coffee with gut support, but the supplied material does not provide a finished-product result for bloating. Bloating can feel like a full or larger-than-usual tummy, discomfort, rumbling, and more gas, according to the NHS. Common triggers include gas, constipation, food intolerance, large meals, fizzy drinks, and caffeine.
For a short, practical response when you feel bloated, the NHS suggests regular movement, water, smaller meals, and avoiding lots of fizzy drinks. Persistent bloating, severe pain, vomiting, or sudden abdominal swelling needs medical attention.
Before you order Four Sigmatic
- Confirm the exact product format: instant coffee, ground coffee, pods, cocoa, or capsules.
- Check the product label for caffeine and the complete ingredient list.
- Ask for current third-party testing records if contaminants are a deciding factor.
- Read the current return and subscription terms before checkout.
- Use public FDA resources and NCCIH guidance to help assess supplement claims and safety questions.
By TopShelfMushrooms.com Editorial Team
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.
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