Dexa Body Scans

A DEXA body scan uses a very low dose of X-rays (dual-energy X-ray absorptiometry) to provide an accurate and precise measurement of your body composition. It is a medical-grade technology that was initially developed to measure bone density and is now universally regarded as the gold standard for measuring body composition (body fat, lean mass and bone).

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The scan is quick and easy with no intervention and there is no claustrophobia. You lie on a padded mattress for just four minutes while the scanning arm makes three passes over your body. The scanning arm remains about 30cm from your body and the bed is completely open - there is no confined 'doughnut' or chamber that you go into as there is with a CT scanner or MRI scanner.

Yes, absolutely. Dr Attia is interested in Visceral Fat (VAT, visceral adipose tissue), Lean Mass Index (LMI), Appendicular Lean Mass Index (ALMI) and Bone Density (BMD, bone mineral density). Interestingly, Dr Attia says that body fat percentage is the “least interesting” number from a DEXA scan. Note that BMD is an indication, assessed as an average across the whole body.

A DEXA scan will reveal your body composition in great detail, showing fat and muscle mass and their distribution, as well as a good indication (a 'scan lite') of your bone density. You'll get a printed and a digital copy that will be available on your customer portal, we'll also go through it with you in great detail.

Our consultants will run through your report with you in detail, and there will be plenty of time to answer any questions that you might have. We also use BodyCompPro the leading DEXA Scanner body composition software so you will find your report filled with rich and easy to understand information along with comparables based on the largest dataset in the UK.

DEXA has two uses and modalities, to measure bone mineral density (BMD) and body composition (fat and lean mass). The latter will provide a good indication of your bone density but it is not a definitive, diagnosable result. If you are primarily concerned about your bone density then you should book an Osteoporosis scan with us.

DEXA is the gold standard for measuring body fat but every measurement method is essentially a prediction of what we would find if we performed an autopsy. Every method will give you a different result because they all ultimately use a different algorithm into which are fed measured data points. While DEXA is considered very accurate, perhaps even more important than accuracy is consistency. Consistency means that even very small changes in body fat will be faithfully recorded. Conversely, it means that recorded changes are real. Because of the volatility and variance of other methods, actual changes may not be picked up and recorded movements in body fat may not have actually occurred.

You can reschedule an appointment up to 24 hours in advance by logging in to your account and selecting 'Amend Appointment' on your upcoming appointment.

If you're wondering 'how much is a DEXA fat scan in the UK?', BodyScan offers very competitive UK pricing for DEXA body scans. The first scan is £189.00 for one person or just £340 for two people, and follow up scans are just £139 each. And remember our scans use gold standard hardware and software unlike some other providers.

Yes, they are very safe indeed. The risk from the radiation is defined as “negligible” by the government and is equivalent to eating 50g of Brazil nuts. Yes, really!

BodyScan has two London clinics - in Marylebone (nearest tubes Baker Street and Regent's Park) and the City of London (nearest tubes Bank and Monument). And our parent company BodyView also has other locations, go to the locations page to find out where is most convenient for you.

DEXA's strength is its consistency in measuring body fat. DEXA is not subject to human error as is the case with skinfold calipers, nor does hydration affect the result, as it does with bio-impedance scales. Most people who use calipers are not qualified to use them and pinching just a centimetre away from the required spot will throw the result way off. Bio-impedance devices work by measuring resistance to a small electrical current, when is then extrapolated to estimate body water and then again to estimate fat.

As with food, we advise minimal exercise before your scan, again to set a standard set of conditions as well as ensure that muscles are not unduly pumped and that you are not breathing heavily when you are on the scanner bed. We want you to be as still as possible.

We recommend that you do not eat, or eat light, for four hours before your scan. This is to ensure you do not have a big meal passing through your system - we want to measure you rather than what you eat! However, you will always have food in your gut - the reason for the 4-hour fast is to set a standard that helps ensure a consistent physiological state each time you have a DEXA scan.

The minimum time between scans is eight weeks but unless you are on an ambitious fat-loss programme we recommend every 12 weeks - long enough for something to have changed and also long enough for you to be confident that your nutrition and exercise regimen is sustainable and that you can keep it up. We usually recommend a weight change of about 3kg before a re-scan.

Please wear comfortable clothing without metal in. No zippers, poppers, or underwired bras please as metal will show up on the scan and can interfere with the results. Something like leggings or tracksuit bottoms or shorts with a top is ideal.