Key Takeaways

Mushroom coffee can upset your stomach, cause jitters, dizziness, or poor sleep.

Some mushrooms may harm your kidneys or liver.

It can interact with medication.

While mushroom coffee is gaining popularity for its potential health benefits, it can also cause side effects, and its long-term safety is not yet fully understood.

1. Gastrointestinal Distress (GI Issues)

Daily mushroom coffee consumption may cause bloating, nausea, or diarrhea , particularly if you drink large amounts or your digestive system is sensitive. Constipation is less common , but still possible, especially with high-fiber fungi.

People with IBS may be more prone to mushroom coffee-related GI issues. In particular, some studies have linked concentrated extract forms of lion's mane and reishi mu

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