We’re the ‘allergy capital of the world’. But we don’t know why food allergies are so common in Australian children

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Australia has often been called the “allergy capital of the world”.

An estimated one in ten Australian children develop a food allergy in their first 12 months of life. Research has previously suggested food allergies are more common in infants in Australia than infants living in Europe, the United States or Asia.

So why are food allergies so common in Australia? We don’t know exactly – but local researchers are making progress in understanding childhood allergies all the time.

Miljan Zivkovic/Shutterstock

What causes food allergies?

There are many different types of reactions to foods. When we refer to food allergies in this article, we’re talking about something called IgE-mediated food allergy. This type of allergy is caused by an immune response to a particular food.

Reactions can occur within minutes of eating the food and may include swelling of the face, lips or eyes, “hives” or welts on the skin, and vomiting. Signs of a severe allergic reaction (anaphylaxis) include difficulty breathing, swelling of the tongue, swelling in the throat, wheeze or persistent cough, difficulty talking or a hoarse voice, and persistent dizziness or collapse.

Recent results from Australia’s large, long-running food allergy study, HealthNuts, show one in ten one-year-olds have a food allergy, while around six in 100 children have a food allergy at age ten.

https://www.shutterstock.com/image-photo/skin-rashes-babies-concept-1228925236
A food allergy can present with skin reactions. comzeal images/Shutterstock

In Australia, the most common allergy-causing foods include eggs, peanuts, cow’s milk, shellfish (for example, prawn and lobster), fish, tree nuts (for example, walnuts and cashews), soybeans and wheat.

Allergies to foods like eggs, peanuts and cow’s milk often present for the first time in infancy, while allergies to fish and shellfish may be more common later in life. While most children will outgrow their allergies to eggs and milk, allergy to peanuts is more likely to be lifelong.

Findings from HealthNuts showed around three in ten children grew out of their peanut allergy by age six, compared to nine in ten children with an allergy to egg.

Are food allergies becoming more common?

Food allergies seem to have become more common in many countries around the world over recent decades. The exact timing of this increase is not clear, because in most countries food allergies were not well measured 40 or 50 years ago.

We don’t know exactly why food allergies are so common in Australia, or why we’re seeing a rise around the world, despite extensive research.

But possible reasons for rising allergies around the world include changes in the diets of mothers and infants and increasing sanitisation, leading to fewer infections as well as less exposure to “good” bacteria. In Australia, factors such as increasing vitamin D deficiency among infants and high levels of migration to the country could play a role.

In several Australian studies, children born in Australia to parents who were born in Asia have higher rates of food allergies compared to non-Asian children. On the other hand, children who were born in Asia and later migrated to Australia appear to have a lower risk of nut allergies.

Meanwhile, studies have shown that having pet dogs and siblings as a young child may reduce the risk of food allergies. This might be because having pet dogs and siblings increases contact with a range of bacteria and other organisms.

This evidence suggests that both genetics and environment play a role in the development of food allergies.

We also know that infants with eczema are more likely to develop a food allergy, and trials are underway to see whether this link can be broken.

Can I do anything to prevent food allergies in my kids?

One of the questions we are asked most often by parents is “can we do anything to prevent food allergies?”.

We now know introducing peanuts and eggs from around six months of age makes it less likely that an infant will develop an allergy to these foods. The Australasian Society of Clinical Immunology and Allergy introduced guidelines recommending giving common allergy-causing foods including peanut and egg in the first year of life in 2016.

Our research has shown this advice had excellent uptake and may have slowed the rise in food allergies in Australia. There was no increase in peanut allergies between 2007–11 to 2018–19.

Introducing other common allergy-causing foods in the first year of life may also be helpful, although the evidence for this is not as strong compared with peanuts and eggs.

A boy's hand holding some peanuts.
Giving kids peanuts early can reduce the risk of a peanut allergy. Madame-Moustache/Shutterstock

What next?

Unfortunately, some infants will develop food allergies even when the relevant foods are introduced in the first year of life. Managing food allergies can be a significant burden for children and families.

Several Australian trials are currently underway testing new strategies to prevent food allergies. A large trial, soon to be completed, is testing whether vitamin D supplements in infants reduce the risk of food allergies.

Another trial is testing whether the amount of eggs and peanuts a mother eats during pregnancy and breastfeeding has an influence on whether or not her baby will develop food allergies.

For most people with food allergies, avoidance of their known allergens remains the standard of care. Oral immunotherapy, which involves gradually increasing amounts of food allergen given under medical supervision, is beginning to be offered in some facilities around Australia. However, current oral immunotherapy methods have potential side effects (including allergic reactions), can involve high time commitment and cost, and don’t cure food allergies.

There is hope on the horizon for new food allergy treatments. Multiple clinical trials are underway around Australia aiming to develop safer and more effective treatments for people with food allergies.

Jennifer Koplin, Group Leader, Childhood Allergy & Epidemiology, The University of Queensland and Desalegn Markos Shifti, Postdoctoral Research Fellow, Child Health Research Centre, Faculty of Medicine, The University of Queensland

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • Strength training has a range of benefits for women. Here are 4 ways to get into weights

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    Picture a gym ten years ago: the weights room was largely a male-dominated space, with women mostly doing cardio exercise. Fast-forward to today and you’re likely to see women of all ages and backgrounds confidently navigating weights equipment.

    This is more than just anecdotal. According to data from the Australian Sports Commission, the number of women participating in weightlifting (either competitively or not) grew nearly five-fold between 2016 and 2022.

    Women are discovering what research has long shown: strength training offers benefits beyond sculpted muscles.

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    Health benefits

    Osteoporosis, a disease in which the bones become weak and brittle, affects more women than men. Strength training increases bone density, a crucial factor for preventing osteoporosis, especially for women negotiating menopause.

    Strength training also improves insulin sensitivity, which means your body gets better at using insulin to manage blood sugar levels, reducing the risk of type 2 diabetes. Regular strength training contributes to better heart health too.

    There’s a mental health boost as well. Strength training has been linked to reduced symptoms of depression and anxiety.

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    Improved confidence and body image

    Unlike some forms of exercise where progress can feel elusive, strength training offers clear and tangible measures of success. Each time you add more weight to a bar, you are reminded of your ability to meet your goals and conquer challenges.

    This sense of achievement doesn’t just stay in the gym – it can change how women see themselves. A recent study found women who regularly lift weights often feel more empowered to make positive changes in their lives and feel ready to face life’s challenges outside the gym.

    Strength training also has the potential to positively impact body image. In a world where women are often judged on appearance, lifting weights can shift the focus to function.

    Instead of worrying about the number on the scale or fitting into a certain dress size, women often come to appreciate their bodies for what they can do. “Am I lifting more than I could last month?” and “can I carry all my groceries in a single trip?” may become new measures of physical success.

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    Strength training can have positive effects on women’s body image. Drazen Zigic/Shutterstock

    Lifting weights can also be about challenging outdated ideas of how women “should” be. Qualitative research I conducted with colleagues found that, for many women, strength training becomes a powerful form of rebellion against unrealistic beauty standards. As one participant told us:

    I wanted something that would allow me to train that just didn’t have anything to do with how I looked.

    Society has long told women to be small, quiet and not take up space. But when a woman steps up to a barbell, she’s pushing back against these outdated rules. One woman in our study said:

    We don’t have to […] look a certain way, or […] be scared that we can lift heavier weights than some men. Why should we?

    This shift in mindset helps women see themselves differently. Instead of worrying about being objects for others to look at, they begin to see their bodies as capable and strong. Another participant explained:

    Powerlifting changed my life. It made me see myself, or my body. My body wasn’t my value, it was the vehicle that I was in to execute whatever it was that I was executing in life.

    This newfound confidence often spills over into other areas of life. As one woman said:

    I love being a strong woman. It’s like going against the grain, and it empowers me. When I’m physically strong, everything in the world seems lighter.

    Feeling inspired? Here’s how to get started

    1. Take things slow

    Begin with bodyweight exercises like squats, lunges and push-ups to build a foundation of strength. Once you’re comfortable, add external weights, but keep them light at first. Focus on mastering compound movements, such as deadlifts, squats and overhead presses. These exercises engage multiple joints and muscle groups simultaneously, making your workouts more efficient.

    2. Prioritise proper form

    Always prioritise proper form over lifting heavier weights. Poor technique can lead to injuries, so learning the correct way to perform each exercise is crucial. To help with this, consider working with an exercise professional who can provide personalised guidance and ensure you’re performing exercises correctly, at least initially.

    A woman doing a lunge outdoors.
    Bodyweight exercises, such as lunges, are a good way to get started before lifting weights. antoniodiaz/Shutterstock

    3. Consistency is key

    Like any fitness regimen, consistency is key. Two to three sessions a week are plenty for most women to see benefits. And don’t be afraid to occupy space in the weights room – remember you belong there just as much as anyone else.

    4. Find a community

    Finally, join a community. There’s nothing like being surrounded by a group of strong women to inspire and motivate you. Engaging with a supportive community can make your strength-training journey more enjoyable and rewarding, whether it’s an in-person class or an online forum.

    Are there any downsides?

    Gym memberships can be expensive, especially for specialist weightlifting gyms. Home equipment is an option, but quality barbells and weightlifting equipment can come with a hefty price tag.

    Also, for women juggling work and family responsibilities, finding time to get to the gym two to three times per week can be challenging.

    If you’re concerned about getting too “bulky”, it’s very difficult for women to bulk up like male bodybuilders without pharmaceutical assistance.

    The main risks come from poor technique or trying to lift too much too soon – issues that can be easily avoided with some guidance.

    Erin Kelly, Lecturer and PhD Candidate, Discipline of Sport and Exercise Science, University of Canberra

    This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • Get Well, Stay Well – by Dr. Gemma Newman

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    Dr. Gemma Newman is a GP (British equivalent of what in America is called a “family doctor”) who realized she was functioning great as a diagnostic flowchart interpreter and pill dispensary, but not actually doing much of what she got into the job to do: helping people.

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    In it, she details what areas of life to look at, what things are most likely to contribute to wellness/unwellness (be those things completely in your power or not), and how to—bit by bit—make all the parts better, and keep them that way.

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  • Terminal lucidity: why do loved ones with dementia sometimes ‘come back’ before death?

    10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.

    Dementia is often described as “the long goodbye”. Although the person is still alive, dementia slowly and irreversibly chips away at their memories and the qualities that make someone “them”.

    Dementia eventually takes away the person’s ability to communicate, eat and drink on their own, understand where they are, and recognise family members.

    Since as early as the 19th century, stories from loved ones, caregivers and health-care workers have described some people with dementia suddenly becoming lucid. They have described the person engaging in meaningful conversation, sharing memories that were assumed to have been lost, making jokes, and even requesting meals.

    It is estimated 43% of people who experience this brief lucidity die within 24 hours, and 84% within a week.

    Why does this happen?

    Terminal lucidity or paradoxical lucidity?

    In 2009, researchers Michael Nahm and Bruce Greyson coined the term “terminal lucidity”, since these lucid episodes often occurred shortly before death.

    But not all lucid episodes indicate death is imminent. One study found many people with advanced dementia will show brief glimmers of their old selves more than six months before death.

    Lucidity has also been reported in other conditions that affect the brain or thinking skills, such as meningitis, schizophrenia, and in people with brain tumours or who have sustained a brain injury.

    Moments of lucidity that do not necessarily indicate death are sometimes called paradoxical lucidity. It is considered paradoxical as it defies the expected course of neurodegenerative diseases such as dementia.

    But it’s important to note these episodes of lucidity are temporary and sadly do not represent a reversal of neurodegenerative disease.

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    Why does terminal lucidity happen?

    Scientists have struggled to explain why terminal lucidity happens. Some episodes of lucidity have been reported to occur in the presence of loved ones. Others have reported that music can sometimes improve lucidity. But many episodes of lucidity do not have a distinct trigger.

    A research team from New York University speculated that changes in brain activity before death may cause terminal lucidity. But this doesn’t fully explain why people suddenly recover abilities that were assumed to be lost.

    Paradoxical and terminal lucidity are also very difficult to study. Not everyone with advanced dementia will experience episodes of lucidity before death. Lucid episodes are also unpredictable and typically occur without a particular trigger.

    And as terminal lucidity can be a joyous time for those who witness the episode, it would be unethical for scientists to use that time to conduct their research. At the time of death, it’s also difficult for scientists to interview caregivers about any lucid moments that may have occurred.

    Explanations for terminal lucidity extend beyond science. These moments of mental clarity may be a way for the dying person to say final goodbyes, gain closure before death, and reconnect with family and friends. Some believe episodes of terminal lucidity are representative of the person connecting with an afterlife.

    Why is it important to know about terminal lucidity?

    People can have a variety of reactions to seeing terminal lucidity in a person with advanced dementia. While some will experience it as being peaceful and bittersweet, others may find it deeply confusing and upsetting. There may also be an urge to modify care plans and request lifesaving measures for the dying person.

    Being aware of terminal lucidity can help loved ones understand it is part of the dying process, acknowledge the person with dementia will not recover, and allow them to make the most of the time they have with the lucid person.

    For those who witness it, terminal lucidity can be a final, precious opportunity to reconnect with the person that existed before dementia took hold and the “long goodbye” began.

    Yen Ying Lim, Associate Professor, Turner Institute for Brain and Mental Health, Monash University and Diny Thomson, PhD (Clinical Neuropsychology) Candidate and Provisional Psychologist, Monash University

    This article is republished from The Conversation under a Creative Commons license. Read the original article.

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  • Health Benefits Of Cranberries (But: You’d Better Watch Out)

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    Health Benefits Of Cranberries (But: You’d Better Watch Out)

    Quick clarification first: today we’re going to be talking about cranberries. Not “cranberry juice drink” that is loaded with sugar, nor “cranberry jelly” or similar that is more added sugar than it is cranberry.

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    The benefits

    Cranberries, even more than most berries, are full of polyphenols and flavonoids that do “those three things that usually come together”: antioxidant properties, anti-inflammatory properties, and anti-cancer properties

    Unsurprisingly, this also means they’re good for the immune system and thus quite a boon in flu season:

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    They’re also good for heart health:

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    Quick Tip: we’re giving you one study for each of these things for brevity, but if you click through on any of our PubMed study links, you’ll (almost) always see a heading “Similar articles” heading beneath it, which will (almost) always show you plenty more.

    Perhaps the most popular reason people take cranberry supplements, though, is their effectiveness at prevention of urinary tract infections:

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    You can probably buy fresh, frozen, or dried cranberries from wherever you normally do your grocery shopping.

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  • Rethinking Diabetes – by Gary Taubes

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