Mushroom coffee has caffeine, but it’s usually less than in a cup of traditional coffee. Most mushroom coffee is a blend of ground coffee beans and mushroom extracts, which cuts the amount of caffeine by up to half compared to regular coffee. As a result, it can reduce the negative effects of caffeine (jitters, dehydration, gastrointestinal discomfort) for people who are sensitive to it.

The mushroom coffee has caffeine commonly used in mushroom coffee including chaga, turkey tail, reishi and lion’s mane. These medicinal mushrooms are referred to as adaptogens and have been shown to help the body cope with stress, improve sleep quality and restore balance. The mushrooms are combined with coffee because of the high levels of antioxidants they contain.

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Medicinal mushrooms in mushroom coffee also offer immune-enhancing benefits. They are rich in polysaccharides, including beta-glucans, which are known for enhancing the immune system and fighting off inflammation. Chaga, reishi and turkey tail are particularly high in these compounds.

While there’s plenty of positive research supporting these health claims, it’s important to note that the fungi in mushroom coffee have been dried and extracted so they aren’t available in their whole form. Additionally, some types of mushrooms (particularly chaga) are high in oxalates, which can affect the development and progression of kidney stones for those who are sensitive.

While many mushroom coffee drinkers don’t experience any side effects, it’s a good idea to consult with your physician or dietitian before trying the beverage. If you have any kidney or digestive issues, for instance, it’s best to avoid mushroom coffee altogether.