Are There Side Effects to Mushroom Coffee?

Most people tolerate mushroom coffee without side effects. Potential reactions include: 1) Digestive sensitivity — some people experience mild GI discomfort when starting, especially with Chaga or Lion's Mane. Start with a half-serving to assess tolerance. 2) Mushroom allergies — rare but possible. If you have known mushroom allergies, consult a doctor. 3) Blood-thinning interaction — Chaga may affect blood coagulation. People on blood thinners should consult a doctor. 4) Caffeine effects — standard caffeine sensitivities apply.