Hayfever Season? How Nutrition Can Help Support Your Histamine Response
If you spend the summer months sniffing and sneezing while everyone else enjoys the sunshine (and showers), and find yourself checking the pollen forecast as often as the weather forecast, you're certainly not alone.
It's thought that around one in four people in Northern Ireland suffer from hayfever. Common symptoms include a runny nose, itchy eyes, sneezing, irritation and redness, all of which can make the warmer months feel less enjoyable. Pollen from trees, grasses and plants is usually the trigger, and you may notice that certain times of year are worse than others depending on which type of pollen affects you most.
As a nutritionist, one of the questions I'm often asked is whether diet can help support people who struggle with seasonal allergies. While nutrition won't cure hayfever, there are ways to support your body's natural histamine response and potentially reduce some of the burden on your immune system.
Understanding Histamine and Hayfever
When your body comes into contact with something it sees as a threat, such as pollen, immune cells called mast cells spring into action.
Their job is to protect your body from unwanted invaders. They release compounds designed to defend you, one of the most important being histamine.
Histamine plays an essential role in your immune response, but when mast cells become overexcited, they can release too much of it. This excess histamine is responsible for many of the classic hayfever symptoms, including:
Runny nose
Sneezing
Itchy eyes
Irritation
Redness
Antihistamines remain an important part of managing hayfever symptoms, whether prescribed by your GP or purchased over the counter. However, alongside your medication, your diet may help support a healthy histamine response.
How to Reduce Your Histamine Load Through Diet
One approach that some people find helpful is reducing their overall histamine load during peak allergy season.
Certain foods naturally contain higher levels of histamine or may encourage histamine release in the body. This doesn't mean you need to avoid them completely, but it may be worth being mindful of how much you're consuming when symptoms are at their worst.
Foods that may contribute to a higher histamine response include:
Cured, Aged and Fermented Foods
Examples include:
Yoghurt
Mature cheeses
Blue cheese
Vinegar
Cured meats
Processed Foods
Many highly processed foods contain ingredients that may contribute to inflammation and are generally best enjoyed in moderation.
Chocolate
Unfortunately for many of us, chocolate can sometimes trigger a histamine response.
Tinned Fish
Tinned fish such as sardines and mackerel may contain higher levels of histamine. Choosing fresh or frozen fish may be a better option for some people.
Leftovers
Histamine levels tend to increase the longer food is stored. Choosing fresh foods where possible and limiting the amount of leftovers you consume may help reduce your overall exposure.
Alcohol
Alcohol can increase histamine activity in the body and may make hayfever symptoms feel worse. If your symptoms are particularly troublesome, reducing or avoiding alcohol for a period may be worth considering.
It would be almost impossible to avoid every food that influences histamine levels. Instead, think about reducing your intake during periods when your immune system is already under pressure from high pollen counts.
Could Dairy Be Making Symptoms Feel Worse?
Some people find that dairy products such as milk, cream, yoghurt and ice cream increase mucus production, which can make congestion feel more noticeable.
While this isn't the case for everyone, it may be worth experimenting with a short dairy-free trial for one to two weeks to see whether you notice any difference.
There are now plenty of dairy-free alternatives available, including plant-based milks, yoghurts and sorbets. Many are fortified with calcium, but you can also support your calcium intake by including foods such as:
Seeds
Kale
Rocket
Watercress
Other dark green leafy vegetables
Foods That May Naturally Support a Healthy Histamine Response
Now for the good news. There are plenty of nutrient-rich foods that may help support your body's response to seasonal allergies.
Boost Your Vitamin C Intake
Vitamin C has natural antihistamine properties and is an important nutrient during allergy season.
Good sources include:
Peppers
Broccoli
Citrus fruits
Berries
Include More Quercetin-Rich Foods
Quercetin is a naturally occurring plant compound that may help support the body's histamine response.
Foods rich in quercetin include:
Onions
Apples
Kale
Broccoli
Load Up on Leafy Greens
Dark green vegetables provide a wide range of nutrients that support overall immune health.
Try adding more:
Rocket
Watercress
Kale
Spinach
Eat More Omega-3 Rich Foods
Omega-3 fats play an important role in helping the body manage inflammation.
Fresh or frozen oily fish such as salmon, trout and fresh mackerel are excellent choices.
Stay Hydrated
It sounds simple, but adequate hydration is essential for overall health and can help keep mucus membranes functioning properly.
Aim to drink water regularly throughout the day, especially during warmer weather.
Consider Local Honey
Many people swear by local honey as part of their hayfever management strategy.
The theory is that consuming small amounts of local pollen through honey may help build tolerance over time. While evidence is mixed, some people find it beneficial and it may be worth trying.
If you decide to give it a go, look for honey produced by local beekeepers rather than supermarket varieties.
Nutrition Support for Hayfever
Hayfever can have a significant impact on quality of life, affecting energy levels, sleep, concentration and enjoyment of the outdoors. While medication remains the cornerstone of treatment, nutrition can be another useful tool in your seasonal allergy toolkit.
As a nutritionist, I work with clients across Northern Ireland to help them understand how nutrition can support overall health, immune function and wellbeing. Small dietary changes can sometimes make a meaningful difference, particularly during periods when pollen counts are high.
Of course, this advice is intended to complement your usual hayfever medication, not replace it. If you're concerned about allergies or ongoing symptoms, always speak with your GP or healthcare professional.
If you'd like personalised advice on how nutrition can support your health goals, Vital Nutrition offers nutrition consultations for clients throughout Belfast and Northern Ireland.
About the author:
Jane McClenaghan is renowned for her down-to-earth, evidence-based approach to nutrition, making healthy eating practical and achievable for everyone.
With over 25 years of experience delivering group sessions for corporate clients and one-to-one consultations, she specialises in women’s health and has helped thousands of people transform their wellbeing through better nutrition.
As the author of two best-selling books and a familiar voice on local radio, Jane is passionate about translating the science of nutrition into real food on your plate and empowering others to make lasting, positive changes for their health.
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