The brain is an energy-hungry organ. Despite comprising only 2 percent of the body’s weight, the brain gobbles up more than 20 percent of daily energy intake. Because the brain demands such high amounts of energy, the foods we consume greatly affect brain function, including everything from learning and memory to emotions.

Just like other cells in the body, brain cells use a form of sugar called glucose to fuel cellular activities. This energy comes from the foods we consume daily and is regularly delivered to brain cells (called neurons) through the blood.

Studies suggest the quality of the foods consumed over the lifetime affects the structure and function of the brain. For instance, the consumption of omega-3 fatty acids found in fish provides structural material to maintain neurons. Studies also suggest omega-3 fatty acids are essential for the transmission of information between brain cells. In contrast, foods that are rich in sugars and saturated fats have been found to promote oxidative stress, which leads to damage of cell membranes.

The food you eat also affects molecules in the brain that support cognition. Some foods, such as those with turmeric, support cognition by helping to maintain molecular events related to energy metabolism.

Recent studies suggest lifestyle choices that affect the metabolism of nerve cells, such as diet and exercise, may in some cases provide a non invasive and effective strategy to counteract neurological and cognitive disorders.

 

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http://www.brainfacts.org/about-neuroscience/ask-an-expert/articles/2012/how-does-the-brain-use-food-as-energy/?utm_content=buffer0e222&utm_medium=social&utm_source=facebook.com&utm_campaign=buffer

大腦是一個消耗能量的器官,儘管大腦只佔我們體重的百分之二,它卻耗掉我們每天攝取的總能量的兩成。由於大腦對能量的需求大,我們所吃的食物很大程度地影響着大腦的功能,包括所有由學習、記憶到控制情感等功能。

就像身體的其他細胞一樣,腦細胞所用的糖叫葡萄糖,它是細胞活動的燃料。這些來自我們每天吃的食物的能量,是經過血液循環送到大腦的細胞 (又稱神經元)。

研究顯示,我們一生所進食的食品的質量,影響着大腦的結構和功能。例如,攝取來自魚類的奧米加3脂肪酸,可以提供修復神經元的結構原材料。研究更指,奧米加3脂肪酸對腦細胞之間信息傳遞的功能非常重要。至於那些高糖和含大量飽和脂肪的食物,卻會助長氧化物的產生,增加對腦細胞的壓力,破壞細胞膜。

我們所進食的食物,亦會影響大腦負責認知功能的分子。有些食物,如薑黃,有助維持能量代謝過程中的分子活動,支援認知功能。

最新的研究更指出,我們的生活習慣影響着神經細胞的代謝,如適當的飲食及適量的運動,可以為我們提供一個有效和堅固的機制,去抵禦神經系統的衰退及認知障礙的形成。

Read more at:
http://www.brainfacts.org/about-neuroscience/ask-an-expert/articles/2012/how-does-the-brain-use-food-as-energy/?utm_content=buffer0e222&utm_medium=social&utm_source=facebook.com&utm_campaign=buffer