Why Dysautonomia Causes Nausea & How to Manage It

snacks for dysautonomia nausea relief charcuterie board

Dysautonomia messes with your autonomic nervous system—the bit that's supposed to run automatically in the background. When it goes haywire, nausea shows up for a few key reasons:

The Vagus Nerve Connection

Your vagus nerve is like the communication highway between your brain and gut. In dysautonomia, this nerve can misfire, sending confusing signals that trigger nausea, bloating, and that delightful "I might vomit any second" feeling.

The science: Research shows that vagal dysfunction disrupts the gut-brain axis, leading to delayed gastric emptying and nausea in conditions like POTS and other forms of dysautonomia. Parasympathetic dysfunction is directly associated with delayed gastric emptying and more severe upper gastrointestinal symptoms.

Blood Flow Issues

When you have dysautonomia (especially POTS), blood pools in your lower body instead of circulating efficiently. Your digestive system needs adequate blood flow to function properly. Less blood = sluggish digestion = nausea.

The science: Studies demonstrate that orthostatic stress in POTS patients reduces splanchnic blood flow (blood to your digestive organs), contributing to gastrointestinal symptoms including nausea. In POTS patients, nausea and abdominal pain are the most frequent noncardiovascular symptoms, with up to 69% experiencing GI symptoms.

Delayed Gastric Emptying (Gastroparesis)

Many people with dysautonomia experience gastroparesis—where your stomach takes forever to empty. Food just sits there, fermenting and making you feel sick.

The science: Research indicates that 36% of POTS patients have abnormal gastric emptying (9% delayed, 27% rapid), which directly correlates with nausea severity.

Immediate Relief Strategies (When You Need Help Right Now)

When nausea hits hard, here's what can actually help:

Ginger

Not just an old wives' tale—ginger genuinely works. It contains compounds called gingerols and shogaols that calm your stomach and reduce nausea signals.

How to use it:

• Fresh ginger tea (steep sliced ginger in hot water for 10 minutes)

• Ginger chews or crystallised ginger

• Ginger beer (look for real ginger, not just flavouring)

The science: Multiple studies confirm ginger's anti-nausea effects, with mechanisms including gastric motility enhancement and anti-inflammatory properties through its active compounds gingerols and shogaols.

Peppermint

Peppermint oil can relax your stomach muscles and reduce that crampy, nauseated feeling.

How to use it:

• Peppermint tea (avoid if you have reflux—it can make that worse)

• Peppermint oil capsules (enteric-coated)

• Sniff peppermint essential oil (seriously, this works)

The science: Research shows peppermint oil enhances gastric emptying and reduces nausea in functional dyspepsia through its spasmolytic effects on the esophagus, stomach, and duodenum.

Cold Foods and Drinks

Cold temperatures can numb nausea receptors and are often easier to tolerate when you're feeling rough.

Try:

• Ice chips or icy poles

• Electrolyte icy poles (hydration + nausea relief in one)

• Chilled watermelon or grapes

• Cold ginger tea

Positioning Matters

Lying flat can make nausea worse. Try:

• Propping yourself up at a 30-45 degree angle

• Lying on your left side (helps with gastric emptying)

• Sitting upright for 30-60 minutes after eating

Long-Term Eating Strategies (Building Your Nausea-Resistant Routine)

Managing dysautonomia nausea isn't just about quick fixes—it's about creating sustainable eating patterns that work with your body.

Meal Timing

Small, frequent meals are your friend. Large meals require more blood flow to digest, which can trigger nausea and dizziness.

Try:

• 5-6 small meals/snacks instead of 3 big meals

• Eat every 2-3 hours to keep blood sugar stable

• Don't skip breakfast – tiny is better than nothing!

Food Combinations That Help

Pairing foods strategically can reduce nausea and keep blood sugar stable:

• Protein + fiber = steadier blood sugar, sustained energy, less nausea

• Salty foods + fluids = better blood volume (crucial for POTS)

• Cold + protein-rich = easier to tolerate when nauseated

Examples (can be served cold):

Look, I know you feel like absolute arse, but here's the thing—you can make feeling like death fancy. Think of it as your personal "I'm barely functioning but make it aesthetic" charcuterie board moment:

• Hard-boiled eggs with fancy salt

• Cold meat (chicken, turkey, roast beef, lamb) with cucumber or pickles

• Tinned tuna or salmon with celery sticks

• Greek yoghurt (full-fat) with chia seeds

• Cottage cheese with cherry tomatoes

• Edamame beans (salted)

• Protein shake (keep it simple—protein powder, water or milk, ice)

• Cheese cubes with olives

• Smoked salmon with avocado

The beauty of these options? You can prep them when you're feeling okay-ish, keep them in the fridge, and graze like a fancy, nauseated gazelle throughout the day. No cooking, no hot food smells triggering more nausea, just cold protein goodness that keeps your blood sugar stable.

Foods to Avoid (When Nausea Is High)

• High-fat foods (slow gastric emptying)

• Spicy foods (can irritate an already sensitive stomach)

• Carbonated drinks (bloating = more nausea)

• Large volumes of liquid with meals (space fluids between meals)

• High-carb meals without adequate protein (blood sugar crashes = worse nausea, and you've already got enough problems)

Hydration Strategy

Dehydration makes dysautonomia worse, but chugging water can trigger nausea. Instead:

• Sip fluids throughout the day (yes, like a delicate Victorian lady)

• Add electrolytes (salt, potassium, magnesium)

• Try oral rehydration solutions or coconut water

• Eat water-rich foods (watermelon, cucumber, lettuce)

• Bone broth (cold or warm) for hydration + protein + electrolytes

3. Supplements for Nausea

Important: Before starting any supplement, you must chat with your healthcare provider. I'm not being overly cautious here—there are genuine risks of drug interactions and adverse effects that need professional assessment based on your individual health status and medications.

Supplements aren't harmless just because they're "natural." They can interact with medications, worsen certain conditions, and cause side effects. What works safely for one person might be dangerous for another.

Ginger Capsules

If fresh ginger isn't practical, capsules can be an effective alternative for managing nausea.

The science: Clinical trials show ginger supplementation reduces nausea in various conditions, with mechanisms including gastric motility enhancement and anti-inflammatory properties.

Important considerations: Ginger has anticoagulant properties and can interact with blood thinners, diabetes medications, and blood pressure medications. Not suitable for everyone, particularly those with bleeding disorders or scheduled for surgery.

Vitamin B6 (Pyridoxine)

B6 helps neurotransmitter function and can reduce nausea, particularly when it's related to hormonal changes or medication side effects.

The science: B6 supplementation has demonstrated anti-nausea effects in pregnancy and other conditions through randomised, double-blind placebo-controlled trials.

Important considerations: High doses can cause nerve damage. B6 also interacts with certain medications including Parkinson's drugs and some anticonvulsants. Dosing must be individualised and monitored.

Magnesium

Many people with dysautonomia are magnesium-deficient, and low magnesium can worsen nausea, muscle cramps, and fatigue.

The science: Individualised diet strategies and supplements including magnesium can reduce the multiorgan system symptoms observed in dysautonomia.

Important considerations: Not safe for people with kidney disease. Interacts with multiple medications including antibiotics, osteoporosis medications, and some heart medications. The form and dose matter significantly—some types cause diarrhoea, others are better absorbed.

Digestive Enzymes

If delayed gastric emptying is part of your nausea picture, digestive enzymes can help break down food more efficiently.

Important considerations: Not suitable for people with active ulcers or acute pancreatitis. Can interact with certain diabetes medications. Quality and formulation vary significantly between brands.

Why You Need Professional Guidance

Look, I get it. You're desperate for relief, and supplements seem like a harmless thing to try. But here's the honest truth: I can't give you dosing information in a public article because I don't know:

• What medications you're taking

• Your kidney or liver function

• Your bleeding risk

• Your other health conditions

• Whether you're pregnant or breastfeeding

• What other supplements you're already using

All of these factors change what's safe and effective for you.

This isn't me being overly cautious—it's me being responsible. I've seen people end up in hospital because they thought supplements were harmless. I've had clients whose "natural" supplements interacted dangerously with their prescribed medications.

If you're interested in trying supplements for nausea management, book a consultation with a qualified healthcare provider (nutritionist, naturopath, GP, or pharmacist) who can:

• Review your complete medication list

• Assess your health status

• Recommend appropriate supplements and doses for YOUR situation

• Monitor for interactions and side effects

Want personalised supplement advice? Book a Deep Dive Consultation at persistentnutrition.com where we can review your individual needs safely.

4. Personal Story: How I Manage Nausea with POTS

Let’s be really honest here: nausea is gross. There's just nothing like the desire to retch at the thought of food, even when you know that eating something will help, get the type or volume of food wrong and you make it worse. Its like food Russian roulette. It can be so tempting to just avoid food all together but then sooner or later all of that stomach acid and super low blood sugar make the nausea intensify. Knowing what to do to stop the vicious cycle really helps.

My morning routine:

All days—high nausea or otherwise—have the same set morning sequence. Otherwise, I'll miss crucial steps and end up with unexpected doom later in the day caused by a missed meal or forgotten medication. Remember, we're dealing with fun fun neurodiversity here.

Step 1: Roll out of bed

• Grab pre-made breakfast (made by past-me, bless her)

  • Breakfast bake (yes, cake for breakfast—I'm slowly perfecting it, dump yoghurt on it)

  • OR chia pudding

  • Both are my current food fixation AND handily fit into the low-nausea-provoking category with a hefty whack of protein and fibre

Step 2: Boil kettle, steep coffee

Step 3: Eat breakfast

Step 4: Take meds

Step 5: Drink coffee and slowly become human

Throughout the day:

Mid-morning: Nut bar or protein shake—grab and go, no brain activity required.

Lunch: Something from the fancy charcuterie list. Cold meat with cucumber or pickles, tinned tuna with seeded crackers (yes, straight from the tin, no shame), marinated tempeh with olives, or whatever else I prepped when I had the energy.

I eat every 2-3 hours to keep things stable. I keep ginger chews in my bag when I'm out.

I've learned that lying down after eating is a disaster for me. I stay upright or propped up for at least 30 minutes, even if I'm exhausted.

Some days, I genuinely arrange my protein snacks on a nice plate and pretend I'm having a fancy charcuterie moment. Does it fix the nausea? No. Does it make me feel slightly more human? Absolutely.

What's made the biggest difference:

Creating a flare plan for high nausea and symptom days that includes the interventions that work best for me. This means that even if my brain is lost to the brain fog, my wife knows she can bring me the right thing that's going to help when I'm nauseous so that I can focus on resting and recovering.

It's also knowing that I can reach out to my GP for additional support and referrals if things go beyond the "normal" limits of my flare experience. Having the resources to ensure my concerns are addressed and I get the support I need if my tried-and-true strategies aren't enough.

It's understanding that even though I have an energy budgeting system that works for me, life happens and causes condition exacerbations that aren't a moral failing but just a part of life that comes with having chronic conditions. Giving myself grace, compassion, and nurture (even if I'm pissed and grieving) helps recovery and facilitates understanding of triggers and ways to navigate in the future.

 "Ready to get personalized support for your dysautonomia symptoms? Book a free 10-minute discovery call to see if nutrition consulting is right for you.

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Medical Disclaimer: None of the above is intended as medical advice, as each person has their own unique health conditions and cannot be treated by generic educational content. Please see your physician before implementing any new strategies to ensure they are right for you.

References

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[3] Choung RS, Locke GR 3rd, Schleck CD, et al. Risk of gastroparesis in subjects with type 1 and 2 diabetes in the general population. Am J Gastroenterol. 2012;107(1):82-88. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC3737368/

[4] Nikkhah Bodagh M, Maleki I, Hekmatdoost A. Ginger in gastrointestinal disorders: A systematic review of clinical trials. Food Sci Nutr. 2019;7(1):96-108. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC7019938/

[5] Inamori M, Akiyama T, Akimoto K, et al. Early effects of peppermint oil on gastric emptying: a crossover study using a continuous real-time 13C breath test (BreathID system). J Gastroenterol. 2007;42(7):539-542. Available at: https://link.springer.com/article/10.1007/s00535-007-2067-3

[6] Lee A, Fan LT. Stimulation of the wrist acupuncture point P6 for preventing postoperative nausea and vomiting. Cochrane Database Syst Rev. 2009;(2):CD003281. Available at: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0082474

[7] Nikkhah Bodagh M, Maleki I, Hekmatdoost A. Ginger in gastrointestinal disorders: A systematic review of clinical trials. Food Sci Nutr. 2019;7(1):96-108. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC6341159/

[8] Sahakian V, Rouse D, Sipes S, Rose N, Niebyl J. Vitamin B6 is effective therapy for nausea and vomiting of pregnancy: a randomized, double-blind placebo-controlled study. Obstet Gynecol. 1991;78(1):33-36. Available at: https://pubmed.ncbi.nlm.nih.gov/2047064/

[9] Pace LA, Crowe MG. Complex Postural Tachycardia Syndrome and Nutrition: A Narrative Review. Curr Nutr Rep. 2021;10(4):267-277. Available at: https://link.springer.com/article/10.1007/s13668-021-00373-1