Home
>
Nutrition
>
Food Intolerance

Food Intolerance

Many people experience unpleasant reactions to foods they have eaten and suspect they have a "food allergy". However, only 2?5% of adults and 2?8% of children are truly "allergic" to certain foods. The remainder of people may be experiencing food intolerance, or food sensitivity, rather than true food allergy.

I think a quick lesson is in order? A food allergy occurs when an individual ingests a food (usually containing a protein) that the body sees as a "foreign" or threatening substance - known as an ANTIGEN or ALLERGEN. The person's immune system responds by mounting an attack, producing large amounts of IgE antibodies, which attach themselves to specialised white blood cells. These cells release histamine and other inflammatory substances, producing "classic" allergic symptoms of swelling and inflammation. Conditions and symptoms such as rhinitis, asthma, wheezing, lip swelling, itchy skin, hives, and eczema involve this type of "allergic" reaction. The allergens involved could be anything from a food protein, pollen from flowers or grasses, house-dust mite or animal dander.

A food "intolerant" reaction also occurs when the body "reacts" to the ingestion of a food. This reaction however may or may not involve the immune system, and may be caused by a food protein, a starch or sugar molecule, other food component, or by a contaminant found in the food (e.g. food colouring, preservative etc.). If the immune system IS involved, it is usually a different class of antibody that is produced, which is why standard food allergy tests can produce negative results, yet noticeable food-related symptoms persist. Many symptoms related to food intolerance are caused by a local inflammatory response in the gut, and a sign of underlying "inflammation".

With food "intolerance", it is worth understanding, that it's rarely the food that is the problem ? it is the person's response to it! Foods containing wheat or milk for example are getting reputations as "bad foods" due to the reactions they can produce in some people. While they can very well be "problem foods" for some, they can also be very healthy foods for others. Food intolerance could be re-named as "poor digestion", as reactions to food are often the result of poor or compromised digestion!

So what can cause food intolerance? Food intolerances are often caused by stress! Food-intolerant people often have low levels of secretory IgA, a class of protective antibodies found in the gut. IgA antibodies protect the body against the entry of foreign substances. Stress leads to a decrease in secretory IgA? a bit of vicious cycle really, but it certainly explains the relationship between stress and food intolerance!

Underlying digestive problems (e.g. low stomach acidity, gut bacterial overgrowth, a "leaky" or damaged gut lining, yeast infection or poor digestive enzyme production) are common "causes" of food intolerance and must be addressed before avoiding foods unnecessarily. Gallbladder disease, gallstones, and pancreatitis may also be underlying causes of reactions to foods, but these will produce other symptoms too.

It is usually large food particles that cause allergic reactions, so proper breakdown of food (especially protein) via cooking and chewing is vitally important. Digestive enzymes or probiotics can often help too to ensure complete digestion, and once digestion is corrected, things can improve quite dramatically.

Signs and symptoms of food intolerance can be quite diverse, depending on how long the person has been ingesting food allergens and how the body has "adapted". Common symptoms include bloating, stomach cramping, diarrhoea or constipation ? yes commonly known as "IBS"! Long term food intolerance may produce symptoms totally unrelated to the digestive system and may include fatigue, joint and muscle aching, depression, headaches and migraine, hyperactivity in children, and even certain autoimmune disorders.

Diagnosing a food intolerance rather than an allergy (via IgE antibody blood testing) is not easy, simply because reactions to foods can occur from anywhere between 12-36 hours after eating? coupled with the fact that an individual may be reacting to more than one food! Exclusion/reintroduction diets are the "gold standard" of tests and the most useful when done properly. They do need to be adhered to for at least 2-4 weeks initially, and are always best done under the guidance of a registered nutritionist or dietician with experience in food allergy and intolerance.

Various blood tests are now available (most useful are IgG antibody tests ? available now via pin-prick blood sample) which may prove useful in many cases ? but only when there are noticeable symptoms. Vega testing (measuring energy flow) and kinesiology (muscle strength testing) are entirely reliant on the skill of the practitioner, so how effective they actually are is very difficult to measure. Whatever the test, none are 100% accurate, and changes to a person's diet based purely on the results of a test cause more confusion than clarity, and very often lead to unbalanced eating, unnecessary food phobias, and possible nutrient deficiencies.

What to do if you suspect you have a food intolerance

1) Keep a food diary and note when symptoms occur
2) Try and identify the possible problem foods
3) Seek advice on how to adapt the diet to improve digestion
4) Eat a varied, fresh and nutritious diet

The most commonly allergic foods? Cow's milk, cheese, soya, eggs, peanuts, wheat, gluten, yeast, corn, rye, chocolate (often the milk in chocolate!), coffee, tea, alcohol (it is the chemicals and preservatives in alcohol, not the alcohol per say), citrus fruit (lemons, oranges), white potato, beef, various spices, tomato, malt, pork, chemical additives, colourings and preservatives in food (especially tartrazine, sodium benzoate, aspartame).

Food intolerances are best dealt with by avoidance of the offending food for a prescribed period of time, followed by a "rotation" diet, in which problem foods are only eaten every three to four days, instead of daily. Young children can often re-introduce foods after three months of avoidance, whereas adults may require six to twelve months of avoidance.

Much food intolerance and even some food allergy problems settle down after long-term avoidance, and especially when digestion is improved. When a problem food is only eaten sparingly, symptoms are less likely to return. The importance of rotating foods varies from person to person and may be related to the severity of the allergies.

The following foods are the least likely to provoke allergic reactions:

Beverages:
Almond milk, Quinoa milk, herb teas, apple juice and other pure or freshly squeezed fruit juices without sugar or additives (dilute 50:50 with water).
Roasted grain beverages may be used as coffee substitutes. If you like fresh coffee, Dandelion root which you can grind in a coffee grinder.
Soya milk is fine UNLESS you have an allergy to soya!

Cereals:
Oats (unless you have diagnosed Coeliac disease or are known to be "sensitive" to gluten)
Oatmeal and Oatbran
Quinoa porridge
Puffed rice and millet cereal
Homemade mueslis

Grains and flours:
Chick pea flour
Potato flour
Buckwheat flour
Rice flour

Cooked whole gains:
Oats, millet, pearl or pot barley, buckwheat groats (also known as Kashi), brown rice, basmati rice, amaranth, quinoa, 100% buckwheat soba noodles, rice noodles.

Breads:
Sprouted grain breads, rice bread, 100% rye or spelt bread (often fine with wheat-sensitive individuals), other wheat and yeast-free breads
100% rice cakes
100% rye crackers

Legumes:
Haricot beans
Chickpeas
Black-eye beans
Kidney beans
Lentils
Navy beans
Pinto beans
Peas
String beans
Tofu (soya bean curd)

Dried beans should be soaked overnight. Pour off the water and rinse before cooking for allotted time. Canned beans often contain added sugar or other potential allergens, so if used they must be rinsed well.

Nuts and seeds Almonds, pumpkin seeds and sunflower seeds ? eat raw with no salt etc. Nut butters are highly nutritious spreads to use in place of butter or margarine, e.g. Tahini, almond butter, hazelnut or cashew butter.

Oils:
Use cold-pressed or expeller-pressed oils (available from health food stores), as they are safer. Do not use corn oil or "vegetable oil" from an unspecified source, as this is usually corn oil.
Rapeseed oil
Linseed (edible linseed or flaxseed) oil
Olive oil
Safflower oil
Sesame oil
Soya oil
Sunflower oil

Protein:
Fresh white fish, salmon, mackerel and tuna and most canned fish, lamb, poultry and fowl.

Vegetables and fruit
All vegetables except corn are generally acceptable on a low-allergen diet, as is all fruits with the exception of citrus fruits. Tomatoes can often cause problems and should be avoided by susceptible individuals. Other food members of the nightshade family (potatoes, aubergine, peppers) may prove problematic with arthritis sufferers.

Lucy-Ann Prideaux MSc BSc RNutr Registered Nutritionist

family-safe home cleaners Northbrook ..

In The News:

The Christmas season brings a surge in Netflix phishing scams targeting shoppers with fake emails. Stacey P received convincing scam but verified account first.

San Francisco Giants invite Jamie Grohsong to throw ceremonial first pitch at Oracle Park after he learned to play baseball with a bionic hand following an injury.

FBI warns cybercriminals are stealing family photos from social media to create fake proof of life images in virtual kidnapping scams targeting victims.

Instagram's new 'Your Algorithm' tool lets you control your Reels feed in real time. The app now gives you power to customize what videos you see.

Major Marquis fintech breach exposes 400,000-plus Americans' data through unpatched SonicWall vulnerability, with Texas hardest hit at 354,000 affected.

Free up iPhone storage fast by clearing large photos and videos from Messages app. Simple steps for iOS users to delete attachments without losing chats.

Scammers are flooding inboxes with fake tracking alerts that mimic real carriers, exploiting the holiday rush to steal logins and personal data.

The Fox News AI Newsletter brings you the latest news on AI technology advancements and the challenges and opportunities AI presents now and for the future.

Texas family reunites with missing 11-year-old cat Grayson after 103 days using Petco Love Lost's AI photo matching technology and community help.

Tired of AI customer service loops? These insider tricks help you escape "frustration AI" and get real human help when you need it most for urgent issues.

Unlock richer audio from your streaming apps with simple tweaks to volume normalization, equalizer settings, and quality preferences for cleaner sound.

Scammers are sending fake Facebook settlement payout emails that mimic legitimate notices from the privacy settlement administrator to deceive users.

Holiday shopping scams surge as fake refund emails target distracted consumers during Black Friday and holiday seasons, costing Americans billions annually.

The AI-powered IRMO M1 exoskeleton features four modes, including turbo, eco, training and rest for hiking, running, cycling and sports with eight-hour battery life.

OpenAI announced upgrades for its ChatGPT Images platform on Tuesday, saying the program can now make more precise edits and produce images more quickly.

Chrome for Android now turns web articles into AI-powered podcast conversations. Get hands-free browsing with Google Gemini's natural audio summaries.

LastPass faces $1.6 million fine from U.K. regulators after 2022 data breach exposed 1.6 million users. Password manager failed proper security controls.

Petco disclosed a data breach exposing customer Social Security numbers, financial account details, and driver's license information due to a software error.

Baseball teams can now analyze complete swing mechanics in normal training environments using Theia's markerless AI system that processes standard high-speed footage.

Smart home hacking fears overblown? Expert reveals real cybersecurity risks and simple protection tips to keep your connected devices safe from hackers.

MIT develops needle-free glucose monitor using light technology. Revolutionary device could replace painful finger pricks for diabetes management.

The ClickFix campaign disguises malware as legitimate Windows updates, using steganography to hide shellcode in PNG files and bypass security detection systems.

Researchers from Osaka Metropolitan University designed a 21-foot dome that combines aquaculture and hydroponics to create a self-sustaining urban food system.

The Fox News AI Newsletter gives readers the latest AI technology advancements, covering the challenges and opportunities AI presents.

ChatGPT data breach exposes personal info of users through partner Mixpanel. OpenAI confirms names, emails compromised in security incident.