Fuel Source (05:58)
FREE PREVIEW
Food is the fuel that powers the human body. Glucose is a sugar that allows cells to create energy. The digestive system extracts glucose from food.
Cooking (03:04)
In the gut, starches break down into glucose, which is necessary for strenuous activities like running. Cooking releases about 80% more energy than raw food.
Digestion (04:38)
There are six steps in digestion. The gut extracts glucose and it enters the bloodstream. Insulin carries the glucose and then it is burned in a chemical process.
Glucose Reserves (02:12)
For many marathon runners, the body’s natural reserves run out at mile 20. Getting sugar into the bloodstream quickly can revive overworked cells.
Fasting (07:05)
The human body evolved to handle periods of food scarcity, which most people do not face anymore. Fasting is a part of many religious practices. Fasting gives the digestive system a break and some research says it has health benefits.
Brain and Digestion (03:27)
The smell of food triggers an enzyme to start producing saliva. The stomach sends a signal to the brain when it is full or empty. The chemicals for hunger are the same as those for anger and rage.
Gut Bacteria (07:16)
The microbiome is the bacteria living in the gut that breaks down food and absorbs nutrients. About 80% of the body's immune cells are in the mucus membrane around the gut. Allergic reactions occur when the immune system sees food as toxic.
Gut Health (05:00)
The microbiome contains microbes that contribute to good gut health. The rise in allergies could be tied to increased exposure to different substances.
Gut Microbiome Changes (08:49)
Environmental factors, like pollution, impact gut health. The microbiome can be restored through diet.
Healthy Gut Bacteria (04:28)
Plant fiber is essential for a healthy microbiome because it feeds gut bacteria. It helps prevent diseases and dispel waste.
Credits: Fuel - Human: The World Within (00:30)
Credits: Fuel - Human: The World Within
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