Stretching The Rubber BandWednesday, May 25, 2016
I remember as a kid having a pair of pyjamas that were held up by an elastic rubber band.
It must have been a pretty cheap rubber band, because every few months it would wear out and lose its stretch, so it had to be replaced it with a new band.
Unfortunately, this is not what can be said about the rubber band that I used in my recent TEDx talk to demonstrate what happens when you try to lose weight.
Unlike the cheap band in my pyjamas, the rubber band I used to represent our physiology trying to gain the weight back, never seems to lose its stretch.
No matter how hard or how long we pull, the rubber band keeps wanting to bring our weight back to where we started.
Yes, perhaps for some people, eventually the rubber band may relax (these would certainly be the exceptions) or may be the “muscles” that we use to pull on the band just grow stronger, which makes it seem easier to keep up the pull – but for all we know, in most people, this “rubber band” is of pretty good quality and seems to last forever.
So, how do we take the tension out of the rubber band ?
Well, we do know that people who have bariatric surgery have a much better chance of keeping the weight off in the long-term and we now understand that this has little to do with the “restriction” or the “malabsorbtion” resulting from these procedures but rather from the profound effect that this surgery has on the physiology of weight regain.
Thus, we know that many of the hormonal and neurological changes that happen with bariatric surgery, seem to inhibit the body’s ability to defend its weight and perhaps even appears to trick the body into thinking that its weight is higher than it actually is.
In other words, bariatric surgery helps maintain long-term weight loss by reducing the tension in the rubber band, thus making it far easier for patients to maintain the “pull”.
And that is exactly how we think some of the anti-obesity medications may be working.
For example, daily injections of liraglutide, a GLP-1 analogue approved for obesity treatment, appears to decrease the body’s ability to counteract weight loss by reducing hunger and increasing satiety, thus taking some of the tension out of that band.
Think of it as sprinkling “magic dust” on that rubber band to reduce the tension, which makes it easier for patients to maintain that pull thereby helping them keep the weight off.
Of course, both surgery and liraglutide only reduce the tension as long as you continue using them.
Undo the surgery or come off your anti-obesity meds and the tension in that band comes back as strong as ever.
For readers, who have no idea what I’m talking about, hopefully things will become clearer after you watch my talk by clicking here.
Wednesday, May 25, 2016
To me, the amazing thing about the international weight control conversation is the fact that linoleic acid research gets almost no attention. Dr. Sharma’s comment about “reducing hunger and increasing satiety” has to do with drug therapy. It may be that the same could be accomplished by reducing linoleic acid intake. For example: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3889814/
In a 2013 presentation at the Endocrine Society’s 95th Annual Meeting and Expo, Frances Sladek noted, “The incidence of obesity in the U.S. has increased from 15% to 35% in the last 40 years and is expected to rise to 42% by 2030. Paralleling this increase in obesity are a number of dietary changes, most pronounced of which is a >1000 fold increase in consumption of soybean oil from 0.01 to11.6 kg/yr/capita from 1909-1999: soybean oil consists of 50-60% linoleic acid (LA), so the energy intake from LA has increased from 2% to >7%/day. LA is an essential fatty acid and a precursor to arachidonic acid, which is linked to inflammation, a key player in obesity, diabetes, cancer, etc. http://press.endocrine.org/doi/abs/10.1210/endo-meetings.2013.OABA.9.SAT-708
Is it not peculiar that the most pronounced dietary change of the 20th Century receives so little conversation?
Wednesday, May 25, 2016
I meant to say “so little attention” at the end if you care to correct my post.