字幕表 動画を再生する 英語字幕をプリント Food is a favorite pastime for many which is convenient because we need it to live. But what would happen to you and your body if you were to completely stop eating food right now? In the first six hours, all is fairly normal. Your body begins to break down glycogen, which stores energy in your body, into glucose which your cells use as fuel. Around 25 percent of energy generated this way is used for your brain alone. while the rest goes to muscle tissue and red blood cells. But after about six hours, this method of energy production halts as the glycogen sources deplete which can lead to the notorious hangry or hungry and angry feeling that many of us know too well. At this point, your body enters a state called ketosis as it begins to fast or starve Because there is very little glucose in your blood, your body must begin to break down fat for energy. This fat is in turn broken down into fatty acids However, your brain can't use long chain fatty acids, which is a problem. Because there's no more glucose and the fats are too large to cross the blood brain barrier. Your brain changes modes and begins to use ketone bodies for energy which are short-chain derivatives of fatty acid. This works for the time being, but ultimately only seventy-five percent of the brain's energy requirements can come from ketones. It still needs glucose, which means your cognitive functioning becomes impaired. It's important to mention that you don't have to be starving to be in ketosis. Many people enter this phase if they are on a low-carb diet or professional athletes who use all of their carbs for an extended period of time, like marathon runners, will be in this state as well. However, beyond 72 hours, not only will your mood and energy suffer but your brain will start to break down your body's own protein. The proteins release amino acid which can be converted into glucose which is great news for your brain but bad news for your body. Basically, your body is cannibalizing itself by destroying your muscle mass. In women, under-nutrition often shuts down the menstrual cycle as the body tries to reduce energy expenditure bone density diminishes and both men and women may experience a loss of libido Within a few weeks, the body's immune system will be so weakened without any vitamins or minerals that many will die from disease. Otherwise, it will continue to use up all energy sources until there's no glucose, fat tissue, or muscle mass left. One of the more common causes of death is cardiac, arrhythmia or heart attack due to the tissue degradation in the heart, diaphragm, and body This is fairly common in those suffering from anorexia. Of course, the body experiences severe organ failure all around Starvation can lead to death in as short as 3 weeks or up to 70 days as documented during the Irish hunger strikes in 1981 Though, the duration of survival is greatly influenced by how hydrated you are and the amount of fat reserves your body has. which in some ways is incredible that the body can sustain for so long with no food. And yet, approximately 795 million people around the world have to deal with this reality. The good news is that the seven richest countries have pledged to lift five hundred million people out of hunger and malnutrition by 2030 But we need to hold them accountable, we are working with an organization called "Global Citizen" to do just that And here's a really easy way that you can help out too. By sharing this video, and then heading to the "Global Citizen" website form here You'll be adding your voice to an important educational movement towards ending hunger worldwide. You can click the screen or use the links in description. It really only takes a few moments.