[billyum]

Fat isn't transformed into sugar, it breaks down into fatty acids which are metabolized using a different pathway. http://en.wikipedia.org/wiki/Fatty_acid_metabolism http://en.wikipedia.org/wiki/Fatty_acid_degradation

[nmjohn]

Sometimes - but they ARE metabolized through the same pathway.

Essentially:

    Glucose ->[0] pyruvate ->[1] acetyl-coa -> TCA cycle

vs

    Fatty acids ->[2] acetyl-coa -> TCA cycle

The TCA is cycle is the actual main energy generating step.

Other times fat absolutely is converted to sugar. It all depends on the metabolic needs of the body and one building blocks are available, and what protein "workers" are able to use the ones that are available.

For example, fatty acid synthase converts acetyl coa back to a fatty acid [3].

[0] Glycolysis: http://en.wikipedia.org/wiki/Glycolysis

[1] pyruvate dehydrogenase: http://en.wikipedia.org/wiki/Pyruvate_dehydrogenase

[2] beta oxidation: http://en.wikipedia.org/wiki/Beta_oxidation

[3]: http://en.wikipedia.org/wiki/Fatty_acid_synthase

[wavegeek]

None of your refs justify your claim that "fat absolutely is converted to sugar".

[nmjohn]

That wasn't my claim, please don't misquote me. What I actually said was "Other times fat absolutely is converted to sugar." There is a very significant difference.

[wavegeek]

So what are those "other times" and where is the evidence?