Common Herbs With MAO Inhibitor Activity: 5 Herbs to Watch Out for

You’re curious about natural mood-boosters, cautious about potential risks, and enthusiastic to understand herbs that pack a MAO-inhibiting punch. Some herbs, like Syrian Rue and Yagé, have been used for centuries in traditional remedies, but their MAOI activity means they don’t always play nice with your diet or meds. Others, like Nutmeg or Licorice, may surprise you with their concealed effects—but how do you spot the red flags before they catch you off guard?

Syrian Rue (Peganum Harmala)

Syrian rue (Peganum harmala) has been utilized for centuries—not just as medicine but as a gateway to deeper experiences. Its seeds contain potent alkaloids like harmine and harmaline, which act as monoamine oxidase inhibitors (MAOIs).

These compounds block the MAO enzyme, slowing the breakdown of neurotransmitters like serotonin, dopamine, and norepinephrine. That’s why you may feel mood shifts or heightened awareness while using it.

But be cautious—Syrian rue’s psychoactive properties come with risks. Should you eat tyramine-rich foods (like aged cheese or cured meats) while taking it, you could trigger hypertensive crises.

Always research interactions before combining it with other substances. The plant’s power demands respect; even small doses can have strong effects. Treat it carefully, and it may open doors—but ignore safety, and it could close them abruptly.

Yagé (Banisteriopsis Caapi Vine)

While you might not recognize the name Banisteriopsis caapi, you’ve probably heard of ayahuasca—and this vine is the cornerstone of that powerful brew. Yagé, as it’s also called, contains harmala alkaloids like harmine and harmaline, which act as MAOIs. These compounds block monoamine oxidase, an enzyme that breaks down serotonin and other mood-regulating chemicals. That’s why yagé has potential antidepressant effects, but it also means you’ve got to watch your diet. Tyramine-rich foods (like aged cheeses) can cause dangerous spikes in blood pressure in conjunction with MAOIs.

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Key ComponentRole in YagéCautionary Note
Harmala alkaloidsInhibit MAO activityAvoid tyramine-heavy foods
HarmineBoosts serotoninCan interact with antidepressants
HarmalineImproves dream statesMight cause nausea
MAOIsLift moodRequires dietary considerations
Traditional useSpiritual healingNot for casual experimentation

If you’re exploring yagé for mood disorders, tread carefully—its power demands respect.

Passionflower (Passiflora Incarnata)

Should you have ever struggled with restless nights or a racing mind, passionflower could be the gentle helper you’ve been looking for.

This calming herb, often brewed as a herbal tea, contains compounds like harman that act as a monoamine oxidase inhibitor (MAOI). By slowing the breakdown of neurotransmitters, it could ease anxiety and boost mental well-being.

But passionflower’s MAOI activity means you’ll need to watch for drug interactions, especially with antidepressants, and follow dietary restrictions—like avoiding tyramine-rich foods—to prevent risky spikes in blood pressure.

While it’s a natural option, consult your doctor before using it, particularly in case you’re on other medications. Enjoy it in moderation, and let its soothing effects work their magic.

Nutmeg (Myristica Fragrans)

Nutmeg isn’t just for pumpkin spice—this warm, aromatic spice packs more than just flavor. It contains myristicin, a compound with potential MAOI activity, which can influence mood by affecting neurotransmitters like serotonin.

In small doses, nutmeg adds depth to dishes, but in larger amounts, it can have psychoactive effects. While some use it for its mood-boosting properties, excessive consumption can lead to toxicity.

Should you be on medications, especially those impacting serotonin, be cautious—nutmeg’s MAOI effects could cause unwanted interactions. Its ability to alter brain chemistry means it’s not just a kitchen staple but something to respect.

Enjoy it in moderation, and always check with a healthcare provider before mixing it with other treatments.

Licorice (Glycyrrhiza Glabra)

Licorice root, with its sweet and earthy flavor, isn’t just for candy—it’s a powerful herb with roots in traditional medicine.

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Glycyrrhiza glabra contains active compounds like glycyrrhizin, which acts as a natural MAO inhibitor, possibly altering neurotransmitter levels in your brain.

While it’s celebrated in herbal medicine for soothing inflammation, it can also mess with cortisol and adrenal function.

Overdoing it? You may face side effects like high blood pressure or low potassium.

Mixing licorice with anti-depressants or other MAO inhibitors? That’s risky—it could trigger hypertensive crises or even serotonin syndrome.

Since it’s concealed in teas, candies, and supplements, always check labels.

Stay mindful of its potency, and don’t let its sweetness fool you.

Balance is key.

Allfit Well Health Team
Allfit Well Health Team

The Allfit Well Health Team is a group of expert physicians specializing in Endocrinology, Pulmonologist, Hematology, and General Care. They provide reliable, evidence-based health information to help readers understand, manage, and prevent medical conditions.