Skip to content
Four Sigmatic logo

Four Sigmatic

Editorial profile

Editorially reviewed by ShrooMap Editorial Team

Unrated directory profile

Four Sigmatic empowers a vibrant life by expertly crafting functional mushroom products. Rooted in Finnish heritage, they use advanced dual-extraction to deliver nature's potent benefits in delicious, accessible daily wellness rituals.

✓ Organic ✓ Non-GMO ✓ Vegan ✓ Gluten-Free

Brand profile accuracy

Use this page as a shopping starting point, not batch-level proof.

ShrooMap records product listings, reputation signals, deal notes, and public brand details. Brand pages are not proof of current stock, legal status, owner verification, or lot-matched COAs. Check the exact product label, seller page, and current lab documents before buying.

Listing signal

Products and retailers can change without notice.

Proof check

COA status only matters when it matches the SKU and lot.

Correction loop

Send stale products, wrong URLs, or outdated claims to the queue.

Business sources

Each date applies to the fields shown beside that source. Other details may need a separate check.

Not cataloged

Products

2012

Founded

40%

Subscription Discount

Four Sigmatic at a glance

Four Sigmatic is a brand from Finland with a presence in the United States. It offers a 60-day money-back guarantee with a full refund for buyers who are not satisfied. U.S. orders ship from within the country through USPS, FedEx, UPS or DHL and take about five working days to arrive, while Canadian orders ship from the U.S. through USPS and are usually handed to Canada Post, arriving in about ten business days. Reviews center on subscription problems, with several buyers saying they were signed up for recurring shipments without agreeing to it and charged for products they did not want.

Pros

  • 60-day money-back guarantee with a full refund
  • U.S. orders ship domestically and arrive in about five working days

Cons

  • Several buyers say they were subscribed without their consent
  • Reviewers report unwanted charges and trouble canceling

About Four Sigmatic

Four Sigmatic is a pioneer in the functional mushroom space, famously known for bringing mushroom coffee to the mainstream. Founded in 2012 by Tero Isokauppila, a 13th-generation Finnish farmer, the company was born from a desire to make the world's most nutrient-dense foods more accessible and delicious. Tero's heritage and deep-rooted knowledge of foraging and Finnish folk medicine laid the foundation for what would become a global wellness phenomenon. The brand's mission is to help people live healthier, more vibrant lives by integrating functional mushrooms into their daily rituals, particularly their morning coffee. The philosophy behind Four Sigmatic is rooted in the concept of 'dual-extraction.' Recognizing that many of the beneficial compounds in mushrooms are locked behind tough cell walls made of chitin, the company uses both hot water and alcohol extraction processes. This ensures that both water-soluble (like beta-glucans) and fat-soluble (like triterpenes) compounds are bioavailable to the consumer. This commitment to potency and efficacy is a hallmark of the brand, distinguishing it from many competitors that use simple ground-up mycelium or non-extracted powders. Four Sigmatic primarily uses the fruiting bodies of mushrooms, which research indicates contain the highest concentration of functional compounds. Over the years, Four Sigmatic has expanded its product line far beyond its original mushroom coffee. Today, their offerings include mushroom-infused proteins, elixirs, cocoas, and even skincare products. Each product is meticulously formulated to provide specific benefits, such as focus, immune support, stress relief, or energy. For instance, their flagship Mushroom Coffee with Lion's Mane is designed to support cognitive function and productivity without the jitters often associated with regular coffee. Their Chaga-infused products focus on immune system support, while Reishi is used for relaxation and better sleep. Quality and transparency are central to Four Sigmatic's operations. All their mushrooms are grown in their native environments whenever possible—for example, their Chaga is wild-harvested from birch trees in Siberia, and their Reishi is grown on linden logs. The products are USDA organic certified, vegan, gluten-free, and undergo rigorous third-party lab testing for purity, including checks for heavy metals, molds, and pesticides. This level of scrutiny ensures that every cup or scoop delivers the clean, effective nourishment the brand promises. Four Sigmatic's impact on the wellness industry is significant. They have sold over 100 million servings worldwide and have been featured in major publications like Forbes, GQ, and The New York Times. The brand has also cultivated a massive community of enthusiasts, often referred to as 'Shroomies,' who share the brand's passion for functional nutrition. By demystifying the world of mushrooms and making them part of a familiar daily habit, Four Sigmatic has not only built a successful business but has also fundamentally changed how people perceive and consume these ancient superfoods. As they continue to innovate, Four Sigmatic remains dedicated to its core values of quality, accessibility, and the belief that nature provides everything we need to thrive.

Founded By

Tero Isokauppila

Special Features

  • ✓ 300M+ cups sold globally
  • ✓ Pioneer of mushroom coffee category
  • ✓ Dual extraction process
  • ✓ Organic certified farm
🏷️ Verified coupon codes

Four Sigmatic Coupon Codes & Deals

Exclusive discounts verified by our team — updated regularly

40% OFF

Save 40% on your first Four Sigmatic order

✓Verified
SHROOFOURSI
Get Deal →

💡 View all brand deals at shroomap.com/deals

Compare More Brands

Explore other top functional mushroom brands and find the perfect products for your wellness goals.

View All Brands

Related Reading

Frequently Asked Questions

What should I check before buying Four Sigmatic?

This is an unrated directory profile, so rely on product labels, official site details, and any documents that ShrooMap has actually reviewed. Profile notes: Organic, Non-GMO, Vegan, Gluten-Free. Confirm each item against the current package, official site, or underlying document before treating it as verified. Check the exact product name, serving details, ingredient panel, and whether a matching COA or lab result is available.

How can I check product availability from Four Sigmatic?

Check the official website or contact the business to ask about current products, ordering options and stockists. This directory profile does not confirm direct online sales, local stock or shipping to your destination.

Does Four Sigmatic do third-party lab testing?

All products undergo rigorous third-party lab testing for purity, heavy metals, molds, and pesticides. Dual-extraction verified. See ShrooMap's lab-result notes for the current document status.

What mushroom products does Four Sigmatic sell?

Four Sigmatic offers coffee, protein, cocoa, elixirs. Their products feature key mushrooms including Lion's Mane, Chaga, Cordyceps, Reishi, Turkey Tail.

How can I verify Four Sigmatic details?

Start with the official website (us.foursigmatic.com) and listed country (Finland (USA presence)). Then match product claims against the package, retailer page, and any available lab-result page.

Community Reviews

Share your experience and help others make informed decisions

Saved products

Brand team?

Claim Four Sigmatic and control the page.

Correct details for free, then upgrade for review responses, more photos, offers, product or menu highlights, and performance reporting.

Verified owner badge 12-photo gallery Review replies Deals + reporting

Community observations

Report a product price

Share an exact functional product and pack. Reports are reviewed before publication; they do not confirm current stock.

Availability reports expire after seven days. Historical prices keep their original date and currency. Up to three reports per day.

Catalog product finder

Compare functional mushroom products.

Narrow a selection of non-psychoactive products by your preferences, then compare ingredients, formats, and listed prices.

  • 01 Choose your preferences
  • 02 Compare catalog products
  • 03 Read the product details
Find products to compare