Metabolic Profiles

[BICEPBULG]

TweetMetabolic Profiles Of The Major Organs

The Brain:
Glucose is virtually the sole fuel for the human brain, except during prolonged starvations. The brain lacks fuel stores and hence requires a continuous supply of glucose, which enters freely at all times. It consumes about 120 grams daily, which corresponds to an energy input of about 420 calories. The Brain accounts for some 60 percent of the utilization of glucose by the whole body in the resting state.

Muscle:
The major fuels for muscle are glucose, fatty acids and ketone bodies. Muscle differs from the brain in its having a large store of glycogen. In fact, about three-fourths of all the gylcogen in the body is stored in the muscles. But like the brain, muscles lack glucose 6 phosphatese, and so it does not export glucose. Rather, it retains glucose, its preferred fuel for burst of activity.

Liver:
The metabolic activities of the liver are essential for providing fuel to the brain, muscle and other organs. Most compounds absorbed by the intestines pass through the liver. which enables it to regulate the level of many metabolites in the blood. The liver can take up large amounts of glucose and convert it into glycogen.

There is one organ that uses glucose differently than the others, and thats your brain. One-quarter of your total fuel supply is used to meet the needs of ongoing cerebral activity. In other words, even though your brain constitutes only 2-3% of your total weight, it is greedier than any other organ as far as fuel is concerned. Furthermore, this organ hoards the fuel it has and will not release it in a crisis. This is another reason to obtain adequate carbohydrates in your diet. Unlike other body organs, your brain can not turn fat into glucose. And like the rest of your body, it needs oxygen, as well as glucose, to change the blood sugar into energy.

Brain Nutrition:
The major food for the brain is Glucose. One of the best ways to keep yours working at optimum levels is to take a tablespoon of honey with your breakfast. Honey has many other goodfacets_ it contains a lot of b-complex vitamins, mineral and propolis( the bee puts this on his hive to protect it from bacteria). It contains hydrogen peroxide and a few amino acids. In addition it contains natural sugars, which are utilized by the body very slowly.
Red grapes are also excellent for maintaning your glucose level.
Vitamin B-complex is the rejuvenator of the body and mind.

The was a passage out of my Exercise For Men magazine. I thought it was very good information.

[Dawza]

TweetThe article is not bad until it gets to the part about the brain. Neuronal tissues have basically no fuel stores, and are dependent upon glucose for fuel normally. Additionally, the "brain," or any tissue for that matter, cannot convert fat into glucose. The glycerol backbone of triglycerides can be metabolized as glucose would, but the actual fatty acid portion must be oxidized via alternative mechanisms.

There is actually one old, old study where rats were fed fatty acids vs. triglycerides- the rats fed triglycerides were fine, but those fed fatty acids only did not fare so well.

I have no idea where the author got the idea that oxygen is needed for "energy" generation. Anaerobic metabolism does not require oxygen, and can keep cells going for a very short time. Ultimately, the oxygen debt must be repaid, but for the time being, glycolysis suffices in the absence of O2.

Honey is all well and good, but if it has H2O2 in it, that is not something to be proud of. Would you drink hydrogen peroxide willingly? In any event, if it does contain H2O2, the quantity is most likely negligible, but it is still not something I would advertise if I were selling a product/idea.

Sorry if this comes off as a rant, but misinformation presented as fact is a pet peeve of mine (no personal insult to you intended).