There is a lot of science to support many diets for humans, I agree. What works for some might not work for others.
True. People need to find what works for them and not rely on one-size-fits-all type of guidelines. In terms of the
science which suggest that high-carb is better than low-carb... Many of those studies were short-term and it has
been shown in other studies that it can take a month or more to adapt the body ( ketoadaption ) to start using
fat as fuel instead of sugar.
I think it is a fad in that people only try them for a short while. These branded diets are too specific and marketed for be a certain time length to encourage the dieters to do it by giving them a focus point...at the end of which a promise of being able to re-introduce the banned foods gradually, though inevitably the weight returns with bad habits as the diets fades away. A big part of large weight loss is morale to keep going and feeling they are cutting things out can get some folk really down...and back on the cakes with a vengeance!
Yes, and one must be careful not to blame a general diet for someones lack of being able to follow it, or a poorly formulated diet
( just to jump on the bandwagon and sell some books ) for the science that backs up the general theory.
There are many low-carb diets which are indeed of the faddish variety which leave out important things... for example a good
high-fat/low-carb diet needs to include an increase of salt intake because the kidneys tend to flush out salt instead of storing it...
salt of course is important and if one doesn't get enough of it one can feel light-headed ( and may even faint ) and feel lethargic ...
such symptoms are sometimes called 'the Atkins flue'. One must also make sure they get enough magnesium to avoid muscle cramping,
as one may not get enough magnesium under a poorly designed high-fat/low-carb diet. But it is easy to make sure one gets enough
salt and magnesium and to drink more water then they perhaps did before... so I wouldn't say that is enough to throw the baby
out with the bathwater especially when there is so much health to gain and body fat to lose.
People could live on 'ideal' diets but majority can't last and the quick loss and repeated gain takes its toll on health in itself.
Encouraging changing eating patterns, portion size and increasing activity needs to be looked at too imo.
The great thing about a proper high-fat/low-carb diet is that one can feel satisfied with the foods that are available and so
it is less likely that one will quit and go back to a sugars to satisfy themselves.
Of course I am not telling anyone what to eat. One can look into the studies and science behind these various things...
and/or try different things for themselves... One can even not bother checking things out and just go with official
nutritional guidelines... I am sure the government wouldn't lead anyone astray ( they even have many
universities - which depend on government funding - to back them up.
I am not saying it is some big conspiracy
but it wouldn't be the first time some well known and highly paid researcher didn't accept new findings and admitted
they were wrong... )