I've been following this thread with much interest (and yes, it was me that moved it ... I confess that I missed it altogether when first posted ..
.. got "buried" in the list of new threads). Much of what I've wanted to say has already been said. But, I would like to share some thoughts with you all.
On the subject of why people abandon lowcarbing ... as has been stated, unpalatability and lack of motivation/desire are the main reasons. Unpalatability is purely in the mind of the beholder -- if a person believes they are deprived for not having bread and potatoes, then it just becomes their own internal negative reinforcement; a self-fulfilling prophecy in a way. I honestly believe it's more difficult to overcome the wall of resistance from WITHIN than from outside. Not to say that external factors -- doctors, family, peers, the media -- aren't difficult to overcome. But the day we are able to say out loud to ourselves ".. lowcarbing is right and good for me, and this is how I will eat and think for the rest of my days" .. well, the protests and arguments from others just becomes yada-yada.
The idea of addiction of course takes this a step further, because true addiction implies PHYSICAL as well as mental dependence. And indeed, the physical "rush" experienced by ingesting a substance to which one is addicted can be objectively measured ... increased heart rate, flushing, salivation ... resulting from the cascade of hormones and neurochemicals ... including insulin, cortisol, serotonin, dopamine .. the list goes on ..
As for physical/health reasons why a person would be compelled to quit a lowcarb/high protein diet ... I can't think of ANY. If you check Wa'il's Studies pages (on the red menu bar) there are no studies to PROVE ill effect from lowcarbing. NONE. Trust me, if there was such a study, he would have published it there. Of course, there are plenty of pseudo-scientific
commentary on the harmful effects of high-protein diets, but these consistently lack supporting evidence or reference. As an aside, I've also made note of the fact that these negative comments are made against excessive protein consumption, and not lowcarbohydrate per se. Also, the anti-FAT studies are based on the consumption of fats in combination with high carbohydrate intake. Studies done on diets that are very high saturated (ie animal-source) fat, and extremely low in carbohydrate, such as some aboriginal peoples around the world ... consistently show the ABSENCE of ill health.
As a nurse, I can imagine some situations where a person might have to restrict protein intake ... such as if they develop severe kidney disease due to infection, or a traumatic shock-state (eg. an accident where a great deal of blood volume has been lost), or alcoholism. However, that does not preclude lowCARB, since the caloric defecit can be made up with fats. Infants and children are able to THRIVE and develop normally following highFAT, moderate protein, carb-restricted ketogenic diets used for treating epilepsy that won't respond to the standard drug therapies.
I realise I'm just repeating what the others have said, but my observation has been that people who follow a lowcarb WOL for health reasons, and not just vanity reasons (that sounds bad, but it's the only word I could think of ..
) will experience benefits that go far beyond the fit of one's clothes, and the number on the scale. And those benefits will be what keeps us firmly on the path to our goal, even if we stray a little now and then.
Life's like that.
Doreen