Supplements for hay fever relief

As hay fever season settles in, many people look beyond traditional antihistamines for additional ways to manage their symptoms. Supplements are often marketed as “natural” alternatives—but it’s important to understand both how they may work and the limits of the evidence behind them.

While some supplements show promise, most are best viewed as complementary to standard treatments rather than replacements.

Can supplements really help with hay fever?

Hay fever symptoms are driven by the body’s immune response to pollen, particularly the release of histamine and inflammatory chemicals. Some supplements aim to:

• Reduce histamine release
• Support the immune system
• Lower inflammation

Supplements that may support hay fever symptoms

Quercetin – the “natural antihistamine”

Quercetin is a plant compound found in foods like apples, onions, and berries.

How it works:

• Helps stabilise mast cells (the cells that release histamine)
• May reduce the amount of histamine released during allergic reactions 
  
  

What to know:

• Often described as a natural antihistamine
• Evidence in humans is still limited, despite promising lab studies 
• May work best when taken preventatively, before symptoms peak

Vitamin C – simple but potentially effective

Vitamin C is widely known for immune support, but it may also play a role in allergy relief.

How it works:

• Acts as a natural antihistamine by helping to lower histamine levels
• Provides anti-inflammatory and antioxidant effects 
  
  

What to know:

• One of the safer and more widely supported options
• Can be obtained through diet (e.g. citrus fruits, peppers) or supplements
• High doses should be avoided unless advised by a professional

Probiotics – supporting the gut–immune connection

Probiotics are beneficial bacteria that support gut health.

How they work:

• Help regulate the immune system
• May reduce the body’s overreaction to allergens
  
  

What to know:

• Research suggests potential benefits, but results vary depending on the strain
• Found in yoghurt, kefir, and fermented foods, as well as supplements

Bromelain – for congestion and inflammation

Bromelain is an enzyme found in pineapple.

How it works:

• Helps reduce inflammation
• May support sinus drainage and ease congestion
  
  

What to know:

• Often combined with quercetin in supplements
• Not suitable for everyone (e.g. those with certain allergies or on specific medications)

Important considerations before taking supplements

• “Natural” doesn’t always mean safe – some supplements can cause side effects or interact with medications
• Quality matters – products vary widely in strength and purity
• Evidence is limited – most supplements are not as well-studied as conventional treatments. This doesn’t mean they are not effective, just that there isn’t enough studies unfortunately.
• Always seek advice – particularly if you are pregnant, have underlying conditions, or take regular medication

The bottom line

Certain supplements - particularly quercetin, vitamin C, and probiotics - may offer mild support for hay fever symptoms by targeting histamine and inflammation. However, they are best used as part of a broader approach that includes pollen avoidance and, where needed, conventional treatments.

A balanced approach - combining lifestyle measures, appropriate medication, and carefully chosen supplements - often provides the best results during hay fever season.