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This simple carbohydrate intolerance breath tests can provide information on whether you have an intolerance to sugars such as lactose or fructose.
You may be referred for a test if you are experiencing symptoms including diarrhoea, nausea, bloating, gas and abdominal cramps as many of these symptoms can be attributed to digesting foods with certain sugars and carbohydrates.
A lactose intolerance breath test can help to uncover malabsorption of lactose (the sugar in dairy).
SIBO (Small Intestinal Bacterial Overgrowth) can cause a false positive result on these tests, so we always recommend to rule out SIBO with a SIBO breath test before taking an intolerance test.
Before you test, there are some things we ask you to do, to ensure safety and accurate results. This includes stopping certain medication and fasting for a short period.
Please read our patient information leaflet for full details.
Do not take any antibiotics
Do not take laxatives or stool softeners Movicol, Dulcolax, Ex-Lax, Senna, Milk of Magnesia etc.
Do not take stool bulking agents Metamucil, citrucel etc.
Do not take motility agents Prucalopride, linaclotide etc.
Do not take probiotics
VSL#3, Actimel, Yakult etc
You can continue taking any other essential medicines.
ⓘ Additionally, there must be a period of one week between any tests which require cleansing of the bowel e.g. colonoscopy, barium enema, before having a breath test.
No anti-diarrhoeal medication (e.g. Loperamide (Imodium))
• Plain white bread
• Plain white rice
• White potatoes (no skin)
• Baked/grilled chicken, turkey, lean beef, lean pork, white fish (no oily fish)
• Maximum of 2 eggs
• Water (non-carbonated)
• Non-flavoured black coffee (no milk)
• Non-flavoured black tea (no milk and no herbal teas)
• 1 tbsp butter/margarine/oil
• Salt to flavour food
Do not eat or drink anything else, eating prohibited foods could give false results for the test.
ⓘ If you are diabetic requiring insulin or diabetes medicine, please ask your doctor if you should change your morning dose. Oral hypoglycaemic medicines are usually not taken that morning until completion of the test and you start eating again.
You must stop eating and drinking and fast for 12 hours before your test.
You may take your essential medicines with a small amount of water but make sure you do not take anything that may affect your bowel (see previous list).
You may brush your teeth, but please try not to swallow any toothpaste.
Do not eat, drink, chew gum, smoke, eat breath mints and/or other sweets on the morning of or during of your test.
If you are diabetic requiring insulin or diabetes medicine, please ask your doctor if you should change your morning dose. Oral hypoglycaemic medicines are usually not taken that morning until completion of the test and you start eating again.
The results will be displayed as a graph that can be analysed by our clinical team to see if have an intolerance to sugars such as lactose.
Your data will be analysed and results written up into a report. The report will be sent to both you and your referring consultant/doctor, who will explain the results to you in a follow-up consultation and find the next step for managing your symptoms.
Self-paying: If you are paying for this test yourself and not through insurance, the cost will be £250.
This cost includes the breath test, analysis and report.
If you have private medical insurance, most companies can cover this for you.
After 24 hours, you can restart any medication and continue your everyday activities as usual.
Your results will be sent to a specialist for investigation, and you will get your detailed results at your next appointment with your consultant, who will discuss the outcome and all treatment solutions.
Yes. The test should be taken at least 4 weeks after antibiotics. If you take a long-term, low dose antibiotic then you may continue. Laxatives and promotility drugs should be stopped from 1 week before.
If you struggle to use the toilet without them, osmotic laxatives, such as Laxido or Movicol can be stopped from 2 days before. Probiotic supplements should be stopped for 1 week before. Fermented foods like kefir and yoghurt are ok to continue.
Anti-diarrhoeal medications, such as Imodium, should be stopped from 2 days before.
Yes. You need to fast for at least 12 hours before the test. You should also follow a strict low-fermentable diet on the day before the test.
pain white bread
plain white rice
plain white potatoes (no skin)
baked or grilled white meat or fish (no oily fish, no skin)
firm or extra firm tofu
eggs (maximum of two)
water
non-flavoured black coffee or black tea (no milk)
only salt may be used to flavour your food
a little butter, oil or margarine is permitted (1tbsp)
No other foods or drinks are allowed.
If the event was within 15-30 minutes after consuming the substrate, the test needs to be repeated.
If the event was more than 30 minutes after consuming the substrate, the test can be continued as
normal.
Glucose is absorbed in the 1/3 rd of the small intestine so it will not be able to detect SIBO that is further along in the small intestine. However, because of this, glucose is more sensitive than lactulose, so you can be more confident that it is SIBO when a test is positive.
Lactulose is not absorbed by the digestive tract and will travel through the entire small intestine and then to the large intestine (colon). This means that lactulose can be fermented by bacteria in the colon, so some tests can be false positive. That being said, a positive lactulose breath test has been shown to predict response to treatment i.e. if you test positive, then you are much more likely to improve with antibiotics.
The breath samples are stable for at least two weeks and across a wide temperature range (-20°C to 40°C). Samples received after two weeks of collection may be invalid.
No. Each test must be taken after fasting for 12 hours and following a subsequent 12-hour pre-study diet.
Taking two tests on the same day will produce invalid results.
Once the kit arrives back to our lab the results will typically be available within 3 working days.
The test is analysed by a state-of-the-art gas chromatography system, which measures hydrogen, methane, and carbon dioxide levels in line with recommendations by the UK and North American Consensus on Hydrogen and Methane-based Breath Testing.
Yes. All results are sent encrypted and password protected to the doctor or healthcare professional who referred you.