Despite a worldwide obsession with diets and fitness regimes, many health professionals cannot correctly answer the question of where body fat goes when people lose weight, a UNSW Australia study shows.
The most common misconception among doctors, dieticians and personal trainers is that the missing mass has been converted into energy or heat.
“There is surprising ignorance and confusion about the metabolic process of weight loss,” says Professor Andrew Brown, head of the UNSW School of Biotechnology and Biomolecular Sciences.
“The correct answer is that most of the mass is breathed out as carbon dioxide. It goes into thin air,” says the study’s lead author, Ruben Meerman, a physicist and Australian TV science presenter.
In their paper, published in the British Medical Journal today, the authors show that losing 10 kilograms of fat requires 29 kilograms of oxygen to be inhaled and that this metabolic process produces 28 kilograms of carbon dioxide and 11 kilograms of water.
Mr Meerman became interested in the biochemistry of weight loss through personal experience.
“I lost 15 kilograms in 2013 and simply wanted to know where those kilograms were going. After a self-directed, crash course in biochemistry, I stumbled onto this amazing result,” he says.
“With a worldwide obesity crisis occurring, we should all know the answer to the simple question of where the fat goes. The fact that almost nobody could answer it took me by surprise, but it was only when I showed Andrew my calculations that we both realised how poorly this topic is being taught.”
The authors met when Mr Meerman interviewed Professor Brown in a story about the science of weight loss for the Catalyst science program on ABC TV in March this year.
“Ruben’s novel approach to the biochemistry of weight loss was to trace every atom in the fat being lost and, as far as I am aware, his results are completely new to the field,” says Professor Brown.
“He has also exposed a completely unexpected black hole in the understanding of weight loss amongst the general public and health professionals alike.”
If you follow the atoms in 10 kilograms of fat as they are ‘lost’, 8.4 of those kilograms are exhaled as carbon dioxide through the lungs. The remaining 1.6 kilograms becomes water, which may be excreted in urine, faeces, sweat, breath, tears and other bodily fluids, the authors report.
“None of this is obvious to people because the carbon dioxide gas we exhale is invisible,” says Mr Meerman.
More than 50 per cent of the 150 doctors, dieticians and personal trainers who were surveyed thought the fat was converted to energy or heat.
“This violates the Law of Conservation of Mass. We suspect this misconception is caused by the energy in/energy out mantra surrounding weight loss,” says Mr Meerman.
Some respondents thought the metabolites of fat were
Oct. 5, 2013 – Sports Palace – Antwerp, Belgium.
Video Rating: 4 / 5
Zoo Med Lizard LadderOur Zoo Med Lizard Ladder provides your scaly friend with climbing activity to relieve boredom and promote exercise. It is a “jungle gym” for your lizard! This fun accessory is easily cleaned wth soap and water. Features easy installation with suction cups. The Lizard Ladder simply sticks to the back or side walls of your terrarium.
Dietary Supplement New! No Fish Oil! No Animal Gelatin Used 1 100% Vegetarian 3 No Animal Products 5 Omega-3 for Brain, Vision and Heart Health* 4 90-Day Supply Finally! A Completely Vegetarian DHA Softgel br Spectrum s newest DHA offering marries algae-sourced omega-3 DHA nutrients with a revolutionary new softgel capsule that s free of animal by-products. DHA is an important brain nutrient and, with diet and exercise, has been found to support a healthy heart* Our fish-free formula provides 120mg of DHA per softgel, all while avoiding the risk of ocean-borne contaminants sometimes found in fish oils. Product of USA *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
Price: $ 19.99
Sold by drugstore.comThis is a review of vibe42 Kegel Exercises For Women - Duotone Ben Wa Balls with string - Silicone Bladder Control Devices, Complimentary eBook with Beginners Exercise Regime, Color Purple. Hope it helps!
- Combine health and fitness with Duotone Ben Wa Balls for Women. Kegels offer numerous Benefits!
- Improve your PC muscle strength and tone for improved Bladder Control, and Pelvic Floor Health. Benwa Kegel Balls are weighted to provide resistance.
- Kegel Exercisers are recommended by Physicians as excellent preparation for and recovery from child-birth. Kegel Exercise Balls are ideal for the prevention of Urinary Incontinence.
- Set of 2 different weights to graduate through the levels of resistance - 30mm 32g - Beginner Single Kegel - and 34mm 52.5g - Moderate to Advanced Double Kegel - including string for safe insertion and removal. Complimentary eBook and Hygiene Pouch included.
- vibe42 Duotone Kegel Exercise Balls are silent, super comfortable, discreet and body-safe. Created from Medical Grade Silicone, Phlalate Free, Latex Free, Hypoallergenic, BPA Free, Dioxon Free. Hygienic and Waterproof. Seamless silicone - You can expect effortless cleaning. Wont rust like Metal Ben Wa Balls!
Click here for reuse options!
Copyright 2014 HealthNutFitness
Click here for more information about 'When you lose weight, where does the fat go? Most of the mass is breathed out as carbon dioxide, study shows'.