Tag Archives: ketogenic

Summer is fattening. Don’t do it in winter.

Seasonal eating proper

More from T.S. Wiley and Dr. Kruse on seasonal eating in what appears to be the primary model for its justification for use in humans – hibernating mammals.

How it goes, or so they say: in summer, hibernators massively overeat, including carb-rich foods, in order to generate muscle and liver insulin resistance, so as to promote body fat growth.  The long light cycle reduces evening melatonin, which pushes back the usual nighttime peak in prolactin, which causes an abnormal resistance to leptin, which induces hypothalamic NPY and subsequent carbohydrate craving.  Ergo, summer is fattening.  In today’s day, increased artificial lights guarantee year-round pseudo-summer; and we no longer experience the benefits of the short light cycle: longer sleep times (akin to hibernation) and fasting – either complete fasting as in hibernation, or pseudo-fasting, ie, a ketogenic diet.

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The curiosities of nicotin..ic acid

Niacin vs. ketosis

Part I.  Rodents

It is thought: niacin causes red itchy face (> 100 mg/d) and acutely lowers FFAs; chronically, it raises some questionable fraction of HDL (> 1000 mg/d) and probably causes diabetes.

It is speculated: niacin binds a particular “ketone” receptor (GPR109?) (physiological relevance?).

It is known: niacin is ketogenic in rats.  Repeat: niacin is ketogenic in rats.

Niacin aka nicotinic acid and nicotamide aka niacinamide both fulfill the requirement for Vitamin B3 (ie, prevent pellagra).  But only the former causes flushing… and only the former is ketogenic (two apparently unrelated phenomena).

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