Unfortunately I can only summarize.<p>On the starvation study it&#x27;s merely one example that highlights how calorie restriction affects people. Yes, it&#x27;s an extreme version, but it is different only in degree from any other calorie restriction, and when people try to reduce by X calories, it&#x27;s probably a linear effect; more restriction, more of these effects. Oddly though, fasting tends not to have these effects, it&#x27;s only in sustained calorie restriction, so fasting in various forms is one of the tools people can use to lose weight.<p>As for the lowered energy output Jason Fung wrote (pg. 53 of the Obesity Code, &quot;One major problem is that the <i>basal metabolic rate does not stay stable.</i> Decreased caloric intake can decrease basal metabolic rate by up to 40 percent. We shall see that increased caloric intake can increase it by 50%.&quot;<p>If you want to learn more here are some sources:<p>Jason Fung - The Obesity Code: <a href="http:&#x2F;&#x2F;www.amazon.com&#x2F;gp&#x2F;product&#x2F;B01C6D0LCK&#x2F;ref=dp-kindle-redirect?ie=UTF8&amp;btkr=1" rel="nofollow">http:&#x2F;&#x2F;www.amazon.com&#x2F;gp&#x2F;product&#x2F;B01C6D0LCK&#x2F;ref=dp-kindle-re...</a><p>Robert Lustig on sugar: 
<a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=dBnniua6-oM" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=dBnniua6-oM</a><p>and also here: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=nxyxcTZccsE" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=nxyxcTZccsE</a><p>Peter Attia on ketosis and fat: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=NqwvcrA7oe8" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=NqwvcrA7oe8</a><p>Reversal of diabetes by diet, also Jason Fung: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=mAwgdX5VxGc" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=mAwgdX5VxGc</a>