Earlier quoted context omitted.
Carbs increase insulin. Insulin increases the level of lipoprotein lipase (LPL) in your body. LPL dictates how much energy you store as white fat. No carbs --> low insulin --> low LPL. So FWIW @ericabiz is correct "It really is the carbs and sugar that do you in". You also responded to @kichuku regarding sugar being sugar: > The natural in sugar is irrelevant. Sugar is sugar; as in fructose is fructose, and glucose i…
> So FWIW @ericabiz is correct "It really is the carbs and sugar that do you in". Its not. The people who are obese mostly [1] consume too much, and often carbs are the culprit. If they reduce their calorie intake, they lose weight. It doesn't matter if they use a keto pseusoscience with that, go to a dietist to follow a raw food pseudoscience diet, or diet solo without a dietist limiting caloric intake on sheer will…
If you are unfamiliar... the core insight is that obesity is an endocrine disorder; your hormones — not your caloric intake nor the amount you exercise — is the primary reason you gain or lose fat.
Here is a short explanation as to why this is:
* [enzymes] whether you store fat or not is determined by enzymes — specifically hormone sensitive lipase (HSL) and lipoprotein lipase (LPL)
* [hormones] production and inhibition of those enzymes is controlled by your hormones — including insulin, adrenaline, cortisol, estrogen and others.
* [diet] the easiest way to control your insulin levels is to keep your blood sugar low; the easiest way to control blood sugar is to eliminate carbs from your diet.
As I mentioned above... this can be simplified as...
No carbs —> suppressed insulin —> maximum HSL production.
'limiting the caloric intake' -- as you suggest -- is a blind alley when discussing this mechanism. It is a necessary but not a sufficient condition to lose weight. Your body won't draw on your fat reserves if it doesn't have to. i.e. it will happily extract the energy it needs from your gut all day long, provided your gut is full. That means you are partially correct; if LPL is low and if you are in a deficit then the body will draw down on your reserves and you will lose weight. But the opposite isn't true. If LPL is high, irrespective of your deficit or your willpower, then you won't lose weight. Conversely 'eating too much' isn't a diabetes risk... provided your hormones are in order.
If you have any sources that contradict the endocrine hypothesis, I would be keen to see them.