Mushroom coffee is having a major moment. From lion’s mane lattes to chaga cappuccinos, it seems like you can’t go a week without seeing fungi-infused brews on your social feed. Even celebrities are getting in on the action, with Kourtney Kardashian and Gwyneth Paltrow investing in mushroom coffee brand Clevr Blends. But what is mushroom coffee exactly, and does it really deliver on its claims of cognitive benefits?

Generally, Quality mushroom coffee coffee is made with adaptogenic mushrooms like reishi, chaga, and cordyceps. These “superfood” mushrooms are known for their health benefits, including stress-reduction and energy-boosting properties. They’re also rich in antioxidants, which may help promote heart health and boost immunity.

These medicinal mushrooms are blended with coffee or a tea blend, typically to create a beverage that’s less acidic and has less caffeine than regular coffee. The result is an alternative that’s thought to be gentler on the digestive system and offer a more sustainable energy boost with no caffeine crash or jitters.

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The most popular brands of mushroom coffee often incorporate other functional ingredients to add to the benefits. For example, MUDWTR uses a blend of lion’s mane, chaga, and cordyceps to improve mood and energy while boosting immune health. The brand is also gluten-free, vegan, and organic to align with various diets and has been carefully tested for purity and quality.

Four Sigmatic is another of the most recognized brands in the industry, offering a range of mushroom coffee powders and instant coffee. Jenna Volpe, RD, a clinical herbalist and owner of Holistic Healing Services & Resources, says she loves that Four Sigmatic uses organic coffee beans and real adaptogenic mushrooms (including some wildcrafted) that are tested for mycotoxins and pesticide residues. She also appreciates that it doesn’t contain any fillers or artificial flavors, making it a great choice for those with dietary restrictions.