If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
It's a combination of both of those I think,
If on VLC, then more excess protein is turned into glucose,
If carbs are abundant, then some of the excess protein is excreted through kidneys, but some of it must be broken down first and a certain amount is turned into glucose as well.
Either way, excess protein means more work for the body.
"There are no short cuts to enlightenment, the journey is the destination, you have to walk this path alone"
Your body will always turn to glucose for energy first. Then it chooses fat, if you're completely starved of both it will eventually make glucose from carbon skeletons which are chains of amino acids after some of the branches have been used.
The liver tries to make glucose because it's the only fuel that can be used by the brain, it's also necessary for high power energy systems.
Burning fat is a slow process and even the leanest person has enough fat stores to sustain them for a long period. We're adapted for starvation and still able to function quite well. Protein is an absolute last resort. The reason excess protein turns to fat is because all our macro nutrients are converted to Acetyl coa (which is used in the Krebs cycle), this happens once the protein and fat are already broken down as acetyl coa always has the same chemical structure. When there's too much Acetyl coa will be turned back into fatty acids through reverse beta oxidation and this goes to your fat cells to be stored for next time you use it.