We get asked about a lot of support options for Histamine Intolerance and Mast Cell Activation Syndrome (MCAS). And essential oils come up often, especially whether they can work as a natural antihistamine support.

The short answer is yes, some essential oils do have properties that support your body’s ability to manage histamine or symptoms from histamine.

But not all oils are safe for MCAS, and a few can actually make things worse. And knowing the difference is what this post is about.

Beth’s journey with essential oil antihistamine support started almost 20 years ago with a single sniff of therapeutic-grade Frankincense that cleared a debilitating headache.

What she learned from that moment, and from the doctorate-level research that followed, is still part of how we approach them with sensitive clients.

In this post, we’ll share what we’ve learned about using essential oils safely as natural remedies for MCAS and Histamine Intolerance. You’ll learn:

• What essential oils are and how they work
• Tips if you are sensitive
• Our top 6 recommended oils
• Some of our favorite blends
• Which oils to avoid
• How to find quality you can actually trust

Let’s get started.

A Skeptic’s First Experience With Essential Oils

The first time Beth smelled a truly high-quality essential oil, she was skeptical.

Here’s how she describes it:

“It was almost 20 years ago. I walked into a presentation on therapeutic essential oils with a major headache. You know the kind, the one that clouds everything.

I didn’t know back then that I had both Mast Cell Activation Syndrome and Histamine Intolerance. I certainly didn’t know the root triggers for my headaches. So I didn’t know how to stop them.

When the sample of high-quality Frankincense was passed around, I smelled it skeptically. But with one good sniff, my headache went away. It was so dramatic.

I’d tried other essential oils before and they never did much. But this therapeutic-grade Frankincense was vastly different from anything store-bought I had tried.

I became fascinated with learning how it worked. I dove into the legitimate research and eventually took doctorate-level courses in essential oils, studying their effects on the limbic and nervous system, the immune system, the hormone system, the digestive system, and more.”

What Beth learned in those years of study is still part of the core of using them in the clinic with clients. Essential oils won’t replace the deeper root cause work. But for the right person, they can act as a meaningful support tool and even support histamine levels.

What Are Essential Oils and How Do They Work?

Essential oils are natural substances extracted from plants. Those plant compounds protect the plant, feed it, and keep it healthy.

Research shows many of these compounds can also help support your body in different ways.

As histamine support, essential oils don’t block H1 receptors directly the way antihistamine drugs do. Their antihistamine-like effects come primarily from preventing histamine release at the mast cell level, reducing inflammation through calming inflammatory pathways, and in some cases modulating other receptor systems.

This is part of what makes some essential oils a useful addition alongside antihistamines. Rather than blocking histamine after release, they can work upstream, helping to prevent issues before they start.

And as Beth’s story shows, sometimes just the aroma alone is healing.

Your sense of smell is one of the most direct pathways to your brain.

Unlike other senses, scent signals travel almost instantly to the limbic system, the part of your brain that regulates emotion, memory, and stress response. It’s why a certain smell can shift your mood before you’ve even had time to think about it. A calming oil like lavender can take the edge off anxiety within minutes. Or something like peppermint can clear mental fog and lift a low mood just as quickly.

Here are some of the ways essential oils may support your body:

• Immune system support
• Cell regeneration
• Antioxidant properties
• Stress and frustration reduction
• Mood and emotion support
• Digestive system support
• Pain relief support
• Antibiotic and antimicrobial properties
• Skin health

They can even help you clean your house!

Are Essential Oils Legitimate?

Essential oils are used in different ways. The most common ways to use them for Mast Cell Activation Syndrome and Histamine Intolerance are:

Yes. Some hospitals have even started using essential oils for help healing infections, reducing stress, and relieving anxiety and depression. And they’ve been used for centuries by healers across many different cultures.

And today you’ll find them in foods, skincare and hair products, cleaning products, supplements, and more.

But not all essential oils are created equal. Brands vary greatly in quality, purity, and strength.

Some contain added chemicals that can trigger allergic reactions and be toxic, especially for those with Mast Cell Activation Syndrome and Histamine Intolerance.

We only use and recommend therapeutic-grade essential oils. More on what that means below.

Storage tip: Keep essential oils in dark-tinted glass containers in a cool, dry place. Light and heat degrade the compounds that make them effective.

Tips for Using Essential Oils with MCAS and Histamine Intolerance

Essential oils are used in different ways. The most common ways to use them for Mast Cell Activation Syndrome and Histamine Intolerance are:

• Diffusion: Using a diffuser is often the safest way to start. If you want to start even slower, you can just open the bottle and take a small sniff or mix it with a carrier oil and use 1 drop on a cotton ball in a dish.
• Topically: This is when you apply essential oils directly to the skin.
• Internally: Some oils can be ingested, but not all are safe for internal use. You need to be really careful about what you use internally.

Remember that therapeutic grade essential oils are highly potent. Even their aromas can be strong. And many need to be diluted to use them safely.

That’s where carrier oils come in. They dilute strong essential oils to make them safer for skin or internal use. Some essential oils will cause skin irritation or burning without one.

We recommend everyone with MCAS or Histamine Intolerance use a carrier oil, especially when starting out.

Examples of common carrier oils are:

• Extra Virgin Coconut Oil
• Extra Virgin Olive Oil
• Jojoba Oil
• Argan Oil
• Almond Oil

How to dilute essential oils:

• For a very gentle essential oil blend: 1 drop essential oil to 1 teaspoon carrier oil
• For a mild essential oil blend: 2 drops essential oil to 1 teaspoon carrier oil
• For a potent essential oil blend: 5 drops essential oil to 1 teaspoon carrier oil

As you can see, even the potent blend is very diluted.

But the safest option for those with Mast Cell Activation Syndrome or Histamine Intolerance is inhalation. Especially if you have supplement sensitivities.

You can consider starting with just a little bit in a nebulizing diffuser like the one below.

Now, how do you find a good quality oil?

How to Find Quality Essential Oils for MCAS

We’ll tell you soon about the top 6 go-to essential oils for Mast Cell Activation Syndrome and Histamine Intolerance.

But first, it is really important to make sure you get good quality essential oils. This makes a huge difference.

There are a number of great Essential Oil companies with very high-quality oils. And there are companies that look great, but really aren’t.

We know of at least one company that claims their products are pure essential oils. But when you dig deeper, you find they also use synthetic fragrance. We finally figured this out because that company’s oils always gave some of us headaches or we reacted to their oils.

It’s very hard to tell which companies are the best without doing a lot of research.

This is our criteria for an essential oil company:

• Top quality extraction process
• No adulteration
• Lists all the ingredients
• Uses NO synthetic fragrance
• Independent, 3^rd party GC/MS testing
• Excellent customer service
• Money back guarantee
• NO Multi-level marketing
• In business for at least 10 years
• Excellent reviews
• Good pricing

After experimenting with dozens of companies and working with over 100 different essential oils, our go-to picks are:

>>> Click here to shop Vibrant Blue Oils and Save 15% with code MASTCELL360

>>> Click here to shop Rocky Mountain Essential Oils

Now, there are other good companies out there too. These aren’t the only ones. But these both meet all the criteria above. Have easy ordering and excellent customer service.

Now that you have a couple of options for where to shop, let’s look at the oils!

Gentle Essential Oils for MCAS and Histamine Intolerance

For those who are ready to try an essential oil, a single oil is often a good place to start.

With a single oil you are changing just one thing. And if you do okay with those or are more robust or further along in your journey, you may do okay with blends.

We’ll talk about a few blends at the end, but let’s start with the top single oils we use personally and recommend in the clinic.

Important Note: if you have Salicylate Intolerance you may need to wait until your intolerance improves, even for inhalation. While there is a lot we don’t know about salicylate content in general because testing has never been done, flowers and resins (chamomile, rose) tend to be lower salicylate than things like herbs which are very high salicylate (peppermint, wintergreen, thyme). Resin-rich oils (frankincense, spruce, juniper) can also contain higher levels of terpenes. All essential oils contain some terpenes, and while these are not salicylates they do act on some of the same biochemical pathways. So people with salicylate sensitivities may react to terpenes, too.

Histamine Supporting Oils

f your primary interest in oils is histamine support, these are a few with the most research behind them. You’ll see a some of them mentioned again below. Oils can be mast-cell friendly supports for many uses!

• German Chamomile
• Blue Tansy
• Helichrysum
• Lavender
• Frankincense

Let’s look at some of the oils we use and recommend most for mast cell and histamine support individually and what some of the many potential benefits are.

Organic Lavender

Versatile and tolerated by many people, this is one of the gentlest places to consider starting. We love this one mixed with aloe for sunburns! And relaxing bedtime routines.

Potential benefits include:

• Mast cell support
• Eases stress and anxiety
• Supports sleep
• Immune system support
• Soothes sore muscles and joints

Generally considered okay for inhalation, diffusion, or topical use. Occasional ingestion is considered acceptable by some but dilute well if you choose to do so.

>>> Get Lavender from Vibrant Blue Oils and save 15% with code MASTCELL360

>>> Get Lavender from Rocky Mountain Oils

Frankincense

Frankincense is one of the most well-researched oils. Beth’s journey with essential oils started here, and it remains a staple.

Many people tolerate this one well and find it helpful.

Potential benefits include:

• Mast cell support
• Anti-inflammatory properties
• Immune system support
• Respiratory health support
• Stress reduction
• Antimicrobial properties
• Eases muscle and joint soreness

Generally considered okay to be inhaled directly, diffused, or applied to skin with a carrier oil.

>>> Buy Frankincense and save 15% off Vibrant Blue Oils with code MASTCELL360

>>> Shop for Frankincense at Rocky Mountain Oils

Holy Basil

Holy Basil (Tulsi) as a tea is very supportive. In the oil, you get concentrated benefits.

Potential benefits include:

• Strong mast cell supporting properties
• Stress relief
• Heart health support
• Antimicrobial, antibacterial, antibiotic, and antiviral properties
• Shown in research to help with asthma, hay fever, respiratory illness, and fevers
• Anti-inflammatory properties and Vitamin C
• Helps with skin irritation and hives

Generally considered okay to be inhaled or applied to skin with a carrier oil. Not for internal use.

>>> Get Holy Basil from Rocky Mountain Oils

Organic Eucalyptus Radiata

A go-to for respiratory and sinus support. Works as a natural decongestant and is one of the gentler eucalyptus essential oil varieties.

Potential benefits include:

• Mast cell supporting properties
• Anti-inflammatory properties
• Antimicrobial, antibiotic, antiseptic properties
• Clears nasal passages, eases sinus congestion, reduces sneezing, relieves a runny nose, relieves cough
• Eases joint and muscle pain
• Reduces stress

Generally considered okay to be inhaled or applied to skin with a carrier oil. Mixes well with lavender, sage, ginger root, and tea tree oil in a diffuser. Not for internal use.

>>> Get Eucalyptus Radiata from Rocky Mountain Oils

Ginger Root

Ginger can be helpful for digestive and gut motility support, among other things.

Potential benefits include:

• Promotes mast cell stabilization
• Antioxidant properties
• Digestive health support
• Mood support

Generally considered okay to be diffused or applied topically with a carrier oil. Can be ingested occasionally, dilute significantly if you do.

>>> Get Ginger Root from Rocky Mountain Oils

Myrrh

Myrrh is a mast cell friendly anti-inflammatory and dental support.

Potential benefits include:

• Shown in research to reduce inflammatory cytokine levels
• Mast cell support
• Strong anti-inflammatory properties
• Pain relief
• Antimicrobial properties
• Dental and gum health support

Generally considered okay to be applied to skin with a carrier oil, or use diluted on the gums.

>>> Get Myrrh from Rocky Mountain Oils

Essential Oil Blends for Antihistamine and Nervous System Support

If you’re just starting out or highly sensitive, beginning with one of the single oils above is the gentler approach. But if you’re a bit further along in your healing journey and tolerating things reasonably well, blends can offer more targeted support in a single bottle.

Below are some of our favorite blends, including options specifically formulated for essential oil antihistamine support.

Histamine Balance Blend

This pre-formulated blend includes several essential oil antihistamine supports. The carrier oil is already included.

Contains:

• Blue Tansy (Tanacetum annuum)
• Lavender (Lavandula angustifolia)
• Manuka (Leptospermum scoparium)
• Ravintsara (Cinnamomum camphora)
• Roman Chamomile (Anthemis nobilis)
• Rosemary (Rosmarinus officinalis ct Camphor)
• Peppermint (Mentha piperita)
• Spruce (Tsuga canadensis)
• Vetiver (Vetivera zizanioides)
• In a base of Fractionated Coconut Oil

Generally considered okay to be diffused or use topically with care. Not for internal use.

>>> Get the Histamine Balance Blend from Vibrant Blue Oils and save 15% with code MASTCELL360

If you are very still sensitive a better option might be Blue Tansy. It’s the main ingredient in the formula above, but as a single oil.

>>> Click to shop for Blue Tansy from Rocky Mountain Oils

Parasympathetic Blend

For many people with MCAS, the nervous system piece is just as important as the histamine piece. When your body is stuck in fight-or-flight, mast cells are more reactive. This blend is designed to help shift that.

Contains:

• Clove Bud (Eugenia caryophyllata)
• Distilled Lime (Citrus aurantifolia)
• In a base of Fractionated Coconut Oil

Applied to the mastoid bone (the small bony bump just behind the ear) it works by stimulating the vagus nerve, which activates the parasympathetic “rest and digest” state. This is one of the most targeted ways to use an essential oil for nervous system calming.

Several people on our team use this one regularly, and it’s a consistent recommendation in the Mast Cell 360 clinic for clients dealing with nervous system dysregulation.

>>> Get the Parasympathetic Blend from Vibrant Blue Oils

Note: This blend contains clove and lime oils. We generally include both on our list of ingredients to avoid but here is where nuance comes in. This blend is specifically formulated for topical application to the mastoid bone, not for diffusing or internal use. That changes the way it interacts with your body. If you’re still very sensitive, start slow or start with a single oil like lavender or frankincense first.

Nerve Support

This pre-formulated blend is one of our team’s most-used for nervous system calming and sleep support. The carrier oil is already included, or you can dilute it further as needed.

Contains:

Bonus Essential Oil Nerve Calm Blend for those with Mast Cell Activation Syndrome and Histamine Intolerance

There are essential oil blends that can be helpful too. This blend has some great mast cell supporting oils. It already has the carrier oil, too. So you don’t have to dilute it.

It contains:

• Basil
• Helichrysum italicum
• Peppermint essential oil
• Marjoram
• In a base of 80% Fractionated Coconut Oil

Several of us on the team find this helps with sleep. Beth used it after a concussion and found it genuinely soothing to the nervous system.

Generally considered okay for inhalation or topical use with care. Not for internal use.

>>> Get Nerve Support from Rocky Mountain Oils

Essential Oils to Avoid with MCAS and Histamine Intolerance

Essential Oils to be careful with or avoid if you have Mast Cell Activation Syndrome and Histamine Intolerance because they can be overstimulating.

Keep in mind that oral use is different from using something topically or through smell.

Here are some of those essential oils to know about with mast cell and histamine issues:

• Cinnamon and blends with cinnamon – is very histamine liberating. This means that it causes mast cells to release histamine.
• Nutmeg and blends with nutmeg – also histamine liberating
• Clove and blends with clove – clove can be histamine liberating but it can also be very helpful for some people used topically. We see mixed results with products that have this in it, so approach them carefully.
• Citrus Essential Oils – don’t use internally, very histamine liberating.
• Juniper, Pine, Spruce – avoid if allergic to these tree species
• Chamomile – avoid if allergic to ragweed

Who Should Use Essential Oils with MCAS

If you have MCAS or Histamine Intolerance, essential oils may be a genuinely helpful tool for:

• Immune support
• Stress and anxiety
• Joint and muscle pain relief
• Anti-inflammatory support
• Mast cell stabilization
• Antimicrobial and antiviral support
• Respiratory health

Essential oils can also promote:

• Immune system balance
• Emotional balance
• Heart health
• Healthy skin
• Respiratory health

If you’re sensitive to perfumes, you may still do well with therapeutic-grade essential oils. There’s a real difference between synthetic fragrance and quality plant-derived oils. It comes down to purity and quality.

Who Shouldn’t Use Essential Oils with MCAS

A small number of people may not tolerate any essential oils yet or shouldn’t use essential oils at all.

• If you’re allergic to a plant — don’t use that oil. For example, a ragweed allergy means avoiding chamomile, and a tree allergy may mean avoiding juniper or spruce.
• If you can’t tolerate any supplements — stick to diffusing only. Don’t use topically or orally.
• If you have Salicylate Intolerance — careful inhalation use only or wait until tolerance improves. No topical or internal use.
• If any essential oil smell gives you headaches or makes you feel worse — stop.

People who react to all essential oils typically have significant toxicity or limbic/parasympathetic dysregulation. It doesn’t mean essential oils are off the table forever. Some people with major Mold Toxicity do fine with therapeutic-grade essential oils and others tolerate them as they improve. But if you’re reacting to everything right now, address those root causes first.

If you’re unsure, start with just a sniff of a bottle and see how you feel before going further. Like anything with MCAS, going slow can be helpful.

Essential oils are one way to support healthier histamine levels and mast cells. But for many people with MCAS and Histamine Intolerance, they work best alongside mast cell supporting supplements.

If you want to go deeper on what we use in the clinic with clients to stabilize mast cells and lower histamine naturally, our Top 8 Supplements Master Class walks through the supplements we use most, onboarding tips for success when you are sensitive, what to do in a flare, and more.

Have you ever tried essential oils antihistamine supports? Or do you have an oil you love to use for other support? Let us know in the comments below!

More Ways to Support Yourself with MCAS

• Low Histamine Foods List for Mast Cell Activation Syndrome (MCAS) and Histamine Intolerance
• The Mast Cell 360 Guide to Our Favorite Kitchen Staples and Top Low Histamine Food Tips
• Safe Skincare for Those With MCAS and Histamine Intolerance
• Non Toxic Cleaning Products for Mast Cell Activation Syndrome, Histamine Intolerance, and Chemical Sensitivity

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