Home > Newsflash, The 24-Hour Diet > Brain Functions Best on Lactose NOT Glucose During Exercise

Brain Functions Best on Lactose NOT Glucose During Exercise

NEWSFLASH November 2008: The “Experts” are wrong again… the brain loves lactose during exercise!

Once again, the “experts” have misled us. First, they told us that our brain wants to run exclusively on sugar (glucose) and that sugar is its preferred fuel. This is absolutely incorrect. Your brain wants to run on ketones produced from burning your own bodyfat, NOT sugar. (see my book “The 24-Hour Diet” copyright 2009 pp 122-131 for the scientific proof of this). When carbohydrates are minimized, the brain naturally obtains all the energy it needs from running on your own bodyfat. It is only when overdosiing on carbs that this mechanism is short-circuited.

So now the truth has emerged that even during exercise, your brain runs on lactate from your muscles, not sugar (glucose).

From Medical News Today*:

Human Brain Feeds on Lactate Not Glucose During Exercise.

“Researchers in Denmark and The Netherlands have discovered that during exercise, the human brain shifts into a higher gear and uses an “alternative energy” source: it does not feed on glucose but on lactate.

“… above a certain level of exercise, as it becomes more strenuous, the muscles shift to another way of making energy, using anerobic respiration, which involves lactate production and does not use oxygen.

“The researchers showed not only that the brain runs on lactate during exercise, but it actually shifts into a higher gear in terms of activity. The said that the findings will open up new areas of brain research that will seek to understand what lactate does to the brain.

“The finding challenges a long held view that the brain is strictly a glucose fuel burner and that only the muscles switch to the lactate alternative. It also adds weight to the idea that lactate is not just a toxic byproduct of exercise, but a rich supplemental source of energy and that the body has sophisticated mechanisms for optimizing where it gets energy from.”

This research shows us that, contrary to popular belief, the brain functions best NOT on glucose, but on lactate during exercise [and on ketones from burning your own fat the rest of the time as the medical textbooks make clear]! The fact that ketones are the preferred brain fuel was known decades ago and published in the world’s leading medical textbooks. The “long-held view” that the brain wants glucose during exercise could have been checked and disproved quickly and easily by any nutritionist, sports doctor or health writer instead of their merely assuming the incorrect view. Be very careful of trusting the so-called “experts”.

* For reference to this article, please review “The 24-Hour Diet”, page 255. You can get a copy of “The 24-Hour Diet” by Professor Peskin by visiting http://www.brianpeskin.com, today.

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