Mushroom coffee might sound like a bizarre blend, but it’s taken the wellness world by storm. Marketed as a healthier alternative to regular coffee, this earthy concoction combines traditional coffee beans with powdered medicinal mushrooms like Reishi, Chaga, and Cordyceps. But while it’s praised for improving focus, reducing stress, and boosting immunity, it’s not without its downsides.
In this article, we’ll dig deep into the side effects of mushroom coffee, covering everything from common mild symptoms to serious health risks and drug interactions. If you’re considering adding this trendy beverage to your routine, this guide will help you sip smarter.
Mushroom coffee is a functional beverage made by blending regular coffee with powdered medicinal mushrooms. These aren’t your average pizza toppings—they’re fungi like Lion’s Mane, Reishi, Cordyceps, and Chaga, known for their adaptogenic and antioxidant properties. These mushrooms are usually processed into tinctures, powders, or extracts before being added to coffee grounds or instant coffee packets.
Advocates claim that mushroom coffee provides:
These effects are attributed to the adaptogens present in medicinal mushrooms, which may help your body cope with stress.
Note: While promising, most of these benefits are based on preliminary studies. See research at NIH for details.
| Feature | Mushroom Coffee | Regular Coffee |
|---|---|---|
| Caffeine Content | Lower | Higher |
| Acidity | Less acidic | More acidic |
| Jitter Risk | Reduced | Common |
| Additives | Mushrooms, adaptogens | Usually none |
| Benefits | Cognitive + Immune | Energy boost only |
These mushrooms contain bioactive compounds like:
Mushroom coffee often contains other adaptogens like ashwagandha or rhodiola, enhancing its stress-fighting properties. Some blends include MCT oil, collagen, or probiotics for added functionality.
Mushroom coffee typically contains 50–70 mg of caffeine per serving, compared to 95–120 mg in regular coffee. This lower dose helps avoid insomnia, jitteriness, and spikes in blood pressure.
Some people report nausea, bloating, or gas after consuming mushroom coffee. This may be due to the mycelium-based powders, which can irritate sensitive stomachs. Taking it with food often helps.
This can occur when your body is adjusting to the lower caffeine content or reacting to certain compounds like Cordycepin. Make sure you’re well-hydrated and don’t consume on an empty stomach.
Even though it has less caffeine, drinking mushroom coffee late in the day can still cause insomnia or disrupt your sleep cycles. Especially if you’re already sensitive to stimulants.
Let’s face it: mushroom coffee doesn’t taste like a caramel latte. The earthy and slightly bitter flavor may take some getting used to. Trying flavored blends like cocoa or vanilla can make it more palatable.
The safety of medicinal mushrooms during pregnancy is largely unstudied. Substances in Reishi or Chaga may affect hormone levels or uterine activity. Always consult your OB-GYN.
Mushroom coffee may stimulate the immune system. This could worsen autoimmune disorders like lupus, rheumatoid arthritis, or MS.
Some mushrooms like Chaga contain oxalates that can strain the kidneys. If you have a history of kidney stones or liver disease, steer clear or consult a specialist.
The developing systems of kids and teens may be more sensitive to adaptogens, caffeine, and bioactive compounds. Mushroom coffee is not recommended for minors.
Reishi and Chaga can act as natural anticoagulants. If you’re on warfarin or aspirin, this may increase your risk of bleeding.
Mushrooms that boost immunity can counteract medications like cyclosporine. This is a serious concern for transplant patients.
Mushroom coffee may lower blood sugar, potentially enhancing the effects of metformin or insulin. This can lead to hypoglycemia.
Caffeine, though reduced, can still interfere with SSRIs, MAOIs, or ADHD medications. Side effects might include dizziness, rapid heartbeat, or mood swings.
Reactions can range from mild rashes to severe anaphylaxis. Watch for:
Some people are allergic to fungi, including common molds or mushrooms like shiitake. Even if you’re fine eating mushrooms, powdered mycelium may cause a reaction.
If symptoms worsen or new ones develop—stop immediately. Seek medical help if you experience trouble breathing or swelling.
Too much of anything can be bad—even mushrooms. Overconsumption can lead to:
Chronic use without breaks might result in the build-up of adaptogens, which can tax the liver or lead to hormonal imbalances.
Although caffeine is lower, pairing it with Cordyceps or ginseng can lead to restlessness, anxiety, and increased blood pressure.
Experts recommend cycling mushroom coffee—using it for a few weeks, then taking a break. This helps prevent tolerance and keeps your body responsive to the compounds.
Stimulants like Cordyceps or even caffeine can worsen anxiety. Mushroom coffee may trigger panic attacks in sensitive individuals.
Even modest doses of caffeine can elevate blood pressure. Some adaptogens may also stimulate the cardiovascular system.
Adaptogenic herbs can interfere with hormone regulation. People with thyroid issues should be cautious, especially with long-term use.
Begin with half a serving and monitor for symptoms. Everyone’s body reacts differently.
Follow a 3-weeks-on, 1-week-off schedule. This reduces risk of tolerance and gives your body time to reset.
Taking mushroom coffee on an empty stomach can cause nausea or dizziness. Pair it with a small snack.
If symptoms like headaches, fatigue, or insomnia persist, stop drinking it.
Any new symptoms like rashes, swelling, or breathing issues should prompt immediate discontinuation.
If you notice unusual symptoms after combining mushroom coffee with your meds, talk to your doctor.
If you have conditions like diabetes, hypertension, or thyroid disorders, consult your healthcare provider before incorporating functional mushrooms.
Less likely, but yes. If you’re sensitive to caffeine, it can still cause mild jitteriness.
In moderation, yes. But regular breaks are advised to avoid adaptogen overload.
Some people feel effects within 30 minutes, while others may notice changes only after several days.
Yes. For instance, Reishi may cause drowsiness, while Cordyceps can lead to overstimulation.
Stop immediately. Drink water, rest, and seek medical attention if symptoms escalate.
Mushroom coffee offers an intriguing blend of benefits, but it’s not a miracle potion. Whether you’re trying to boost brain power or cut down on caffeine, understanding the side effects, from mild to serious, is crucial.
Start slow, read ingredient labels, and always consult your doctor if you’re unsure. With the right approach, you can enjoy the perks without the pitfalls.
