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Cortisol, the body's primary stress hormone released by the adrenal glands, is crucial for the fight or flight response, increasing energy availability during stress. Cortisol levels follow a daily rhythm, peaking in the morning and decreasing at night. Chronic stress elevates cortisol, potentially causing weight gain, high blood pressure, and impaired immunity. Cortisol impacts metabolism, blood sugar, inflammation, memory, and mood; balanced cortisol is essential for health. Both high and low cortisol levels can be detrimental. Consistently high cortisol can lead to Cushing's syndrome, while low cortisol can result in Addison's disease, characterized by fatigue, weight loss, and low blood pressure. Balanced cortisol levels are therefore important.

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Sugar, not fat, causes fat accumulation. When sugar is consumed, insulin levels increase. Insulin's primary role is to inhibit other forms of energy use, including fat metabolism. Consequently, fat accumulates in the blood, leading to elevated blood fat levels. Individuals with high sugar intake tend to have elevated triglycerides due to high insulin levels. High insulin levels are generally associated with diets rich in sugar, especially refined sugars.

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Cortisol is the body's primary stress hormone, released by the adrenal glands to aid the fight or flight response by increasing energy. Cortisol levels follow a daily rhythm, peaking in the morning and decreasing at night. Chronic stress elevates cortisol, potentially causing weight gain, high blood pressure, and impaired immunity. Cortisol impacts metabolism, blood sugar, inflammation, memory, and mood; balanced cortisol is crucial for health. Both high and low cortisol levels can be detrimental. Consistently high cortisol can lead to Cushing's syndrome, while low cortisol can result in Addison's disease, marked by fatigue, weight loss, or low blood pressure. Balanced cortisol levels are essential.

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High cortisol levels may increase the risk of developing diabetes. Cortisol can break down bone, fat, and muscle tissue, sending the breakdown products to the liver. The liver uses these products to make glucose and release it into the bloodstream. The liver also stores glucose as glycogen, which can be converted to glucose with the help of epinephrine and norepinephrine. High cortisol levels can increase the effectiveness of these two hormones, resulting in more glycogen breakdown into glucose. These mechanisms can cause excess glucose to build up in the blood, potentially leading to insulin resistance and type two diabetes.

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- So if we have this hormone called cortisol, cortisol does a couple of interesting things: increases the inflammation that we experience, it increases our heart rate, it increases our blood pressure, it makes us more mentally stressed, we feel more mentally stressed, and it floods our bloodstream with sugar. - Now since it does all of these different things, each of these things goes back and regulates cortisol. - So there's a really interesting set of studies that show that people who have been traumatized have high levels of cortisol. - And those high levels of cortisol increase their hypervigilance, make it hard for them to go to sleep, and the cortisol is doing that to your brain.

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Cortisol, the stress hormone produced by the adrenal gland, redirects energy to the brain, negatively impacting it. Cortisol also affects glucose levels by interfering with mitochondria. Higher cortisol levels lead to greater glucose spikes but impaired clearance. This mitochondrial interference results in insulin resistance. Increased stress correlates with elevated fasting insulin due to reduced mitochondrial function. Addressing the stress is presented as the primary solution.

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Insulin, a hormone made by your pancreas, is essential for life. Your body's main source of energy is glucose, a simple sugar that comes from the food you eat. Insulin is released when glucose enters your bloodstream to help glucose get to the cells found in your muscles, fat, and liver. When you have insulin resistance, those cells don't respond like like they should to insulin. And when that happens, glucose can't efficiently be removed from your bloodstream or stored for later use. If those cells become too resistant to insulin, your blood sugar can become too high, leading to hyperglycemia. And over time, this can lead to prediabetes and type two diabetes.

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When glucose is ingested, it causes a glucose spike in the bloodstream, which insulin lowers. The higher the glucose, the more insulin the pancreas releases. Insulin sequesters glucose to the liver and fat for storage. Insulin's job is to take whatever you're not burning and put it into fat for storage. Insulin is the energy storage hormone. If you're active, glucose will clear into muscle, so blood glucose won't rise as much and the pancreas will put out less insulin. If you didn't exercise, the insulin will take the excess glucose in your blood and store it as fat. This insulin rise is particularly egregious in terms of metabolic disease.

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Cortisol is an energy signaling molecule indicating a need for energy. It liberates free fatty acids into the bloodstream to prepare the body. Problems arise when cortisol remains elevated throughout the day without downregulation. There's a difference between slightly elevated cortisol all day versus a large spike after training that then decreases. Ingesting carbohydrates signals the presence of nutrients and energy, specifically carbohydrates, which can cause cortisol levels to decrease because the body doesn't need to liberate free fatty acids for fuel.

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Stress increases cortisol, which can lead to increased hunger and eating more. Cortisol can also cause belly fat gain and muscle mass loss, resulting in skinny arms and legs with a large belly. Cushing's syndrome, caused by a cortisol-producing tumor, exhibits similar symptoms like a large belly, skinny limbs, and a hump on the neck. Eating under stress impairs nutrient absorption. Nerves connect the brain to fat cells, and stress causes fat cells to store more fat instead of functioning properly. Therefore, eating under stress can lead to weight gain.

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Fructose in high fructose corn syrup is claimed to severely damage metabolism and the liver because it's a refined, ultra-processed food lacking protective elements. Chronic stress can activate the body to convert things into sugar. Less than five hours of sleep nightly is said to increase cortisol and visceral fat. Steroids, antibiotics, antidepressants, and anti-anxiety medications may also increase visceral fat. Refined sugars and starches, such as glucose syrup, dextrose, maltodextrin, and modified food starch, are considered very harmful to metabolism, contributing to visceral fat and internal damage.

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Insulin resistance silently damages every system in the body, often without symptoms. Elevated insulin causes the kidneys to retain sodium, increasing blood volume and pressure, leading to hypertension. In type 2 diabetes, the pancreas overproduces insulin to stabilize blood sugar, eventually failing and causing blood sugar to rise. Chronically high insulin raises IGF-1, a growth hormone that can fuel cancer cell growth. Insulin resistance also changes the lipid panel, leading to higher triglycerides and lower HDL levels, driving cardiac disease. Insulin resistance is a health crisis, but it can be caught early and reversed.

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Chronically elevated cortisol increases glucose release into the bloodstream, regardless of current blood sugar. This can lead to increased blood sugar levels and insulin resistance. The consequences include increased appetite, weight gain, and decreased muscle mass. Therefore, if you feel your metabolism is not functioning optimally, you should check your cortisol levels and evaluate your stress management practices.

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The brain has receptors that monitor cortisol levels to detect threats. High cortisol levels signal the brain that it is in danger of dying. The brain's primary concern becomes starvation. To protect us, cortisol causes the body to store extra fat in abdominal fat cells. This allows us to digest the fat and survive until food is available. Therefore, stress causes belly fat.

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Insulin resistance is not just about blood sugar or body weight. It's silently damaging every system in your body, often without any symptoms at all. Elevated insulin causes your kidneys to retain sodium, and this increases overall blood volume and blood pressure. This is a direct pathway from insulin resistance to high blood pressure. What about type two diabetes? Your pancreas keeps pumping out more and more insulin to try to stabilize blood sugar, but eventually it can't keep up. Blood sugar rises and full blown diabetes sets in. Next, let's talk about cancer risk. Chronically high insulin levels raises IGF-one, which is a growth hormone.

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Stress makes you gain weight. Did you know that? When we are stressed, the body releases a hormone called cortisol. This is a stress hormone. And cortisol leads to weight gain, specifically around the waistline. Cortisol also breaks down muscle, which reduces your metabolism and leads to further weight gain.

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Cortisol is an essential hormone, not inherently bad. It wakes us up and provides energy. As a stress hormone, it burns energy and pares down muscle, making us more efficient at storing calories, which helps us survive on less. It also encourages fat storage. Chronically elevated cortisol levels can cause problems, leading to increased visceral body fat and more fat storage in the midsection.

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Cortisol makes you gain weight. Now it's a stress hormone. When you have high levels of cortisol, it causes you to gain belly fat, it causes your muscles to break down, it makes you more resistant, it raises your blood pressure, it shrinks your memory center in your brain. And what happens is stress also affects your fat cells, literally your nervous system, your autonomic nervous system, your sympathetic nervous system, your fight or flight nervous system has neuronal connections to your fat cells. So literally when you're stressed, your fat cells are listening. And when your body is actually in a state of stress, it's not designed to actually lose weight initially because you want to be flooding your body with sugar and fatty acids.

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The brain has receptors that monitor cortisol levels to detect threats. High cortisol levels signal the brain that it is in danger of dying, with starvation being the primary concern. To protect against starvation, cortisol causes the body to store extra fat in abdominal fat cells, which can be digested for energy until food is available. Therefore, stress causes belly fat.

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Cortisol makes you gain weight. Now it's a stress hormone. When you have high levels of cortisol, it causes you to gain belly fat, it causes your muscles to break down, it makes you more resistant, it raises your blood pressure, it shrinks your memory center in your brain. So literally when you're stressed, your fat cells are listening. And when your body is actually in a state of stress, it's not designed to actually lose weight initially because you want to be flooding your body with sugar and fatty acids. And so you're basically inhibiting the process of metabolism metabolism and you're increasing your fat storage and you're doing all these things that are really bad. And they're good if you're running from a tiger for two minutes, but not if you're doing this every day.

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High cortisol levels may increase the risk of diabetes because cortisol breaks down bone, fat, and muscle tissue. The breakdown products go to the liver, which uses them to make glucose and release it into the bloodstream. The liver also stores glucose as glycogen. Cortisol can increase the effectiveness of epinephrine and norepinephrine, two stress hormones that help the liver break down glycogen into glucose. These two mechanisms can cause excess glucose to build up in the blood, leading to insulin resistance and potentially type 2 diabetes.

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Cortisol, a stress hormone, can cause weight gain due to overactive stress responses. High cortisol levels lead to belly fat accumulation, muscle breakdown, insulin resistance, elevated blood pressure, and shrinkage of the brain's memory center. Stress impacts fat cells through neuronal connections, causing them to store more fat. When stressed, the body inhibits metabolism and increases fat storage, which is beneficial for short-term survival situations, but detrimental when experienced daily.

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Prediabetes occurs when insulin levels are high to maintain normal blood sugar. Diabetes is diagnosed when insulin can no longer control blood sugar. By the time someone is diagnosed as diabetic and arteries are found to be clogged, the damage didn't happen overnight. It takes 10-15 years of prediabetes to develop diabetes. The process often starts in your 30s and 40s with a bad lifestyle, sugar intake, and frequent eating, leading to hyperinsulinemia, or high insulin. Over time, the body makes more and more insulin because it becomes resistant to insulin.

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Not getting quality sleep leads to higher levels of cortisol (the stress hormone), higher levels of glucose, higher levels of the hunger hormone ghrelin, and lower levels of the fat-burning, satiety hormone leptin, which the speaker says are all bad and can lead to poor decisions and an unproductive day. Studies from the University of Chicago indicate sleeping less than seven hours is significantly linked to a higher likelihood of diabetes or developing diabetes. Other research shows that lack of sleep for a few days can produce blood sugar levels that mimic prediabetes. A PubMed study found that after one week of short sleep, blood sugar levels are disrupted so significantly that a doctor would classify you as pre diabetic. Additionally, when sleep quality is poor, the beta cells in the pancreas stop being sensitive to the signal of high glucose.

Huberman Lab

How to Control Your Cortisol & Overcome Burnout

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Welcome to the Huberman Lab podcast. I'm Andrew Huberman, a professor at Stanford, and today we're discussing cortisol, its importance, and how to manage it to avoid or overcome burnout. Cortisol is often labeled as a stress hormone, but it plays a crucial role in energy deployment and overall well-being. The key takeaway is to maintain a proper cortisol rhythm: high in the morning shortly after waking and low in the evening before sleep. This rhythm is essential for health, mood, sleep, and performance. If you're feeling burnt out, wired and tired, or experiencing morning anxiety, adjusting your cortisol rhythm can help. Cortisol is produced in the adrenal glands and is involved in energy regulation, particularly glucose release into the bloodstream. It acts on a slower time scale compared to adrenaline, which is released quickly in response to stress. Understanding cortisol's role as an energy hormone rather than just a stress hormone is crucial. Your cortisol levels fluctuate throughout the day, with a specific pattern: minimal secretion before sleep, a slight rise during the early hours of sleep, a significant increase during the last hours of sleep, and a sharp spike upon waking. This spike is known as the cortisol awakening response (CAR), which is vital for feeling alert in the morning. To optimize cortisol levels, get bright light exposure within the first hour of waking. Sunlight is best, but a 10,000 lux artificial light can also work. Hydration is also important; drinking water first thing in the morning can help increase alertness and cortisol levels. Caffeine can be beneficial but should be consumed later in the morning to avoid a sharp decline in cortisol levels. Exercise is another effective way to manage cortisol. Regular exercise at the same time each day can help anchor your cortisol rhythm. However, exercising late in the day can spike cortisol levels, which may disrupt sleep. If you must work out later, ensure you consume starchy carbohydrates afterward to help lower cortisol. In the evening, it's essential to keep cortisol low. Dim lights and avoid bright screens, especially those emitting blue light, which can increase cortisol levels. Engaging in calming activities, such as breathing exercises or non-sleep deep rest (NSDR), can help reduce stress and lower cortisol. For those experiencing burnout, there are two patterns: one where individuals wake up stressed and crash in the afternoon, and another where they feel sluggish in the morning but are wired at night. Each pattern requires different strategies to manage cortisol effectively. Supplements like ashwagandha and apigenin can help lower cortisol levels, but they should be used in conjunction with behavioral strategies. Ashwagandha can reduce cortisol by 11% to 29%, while apigenin, found in chamomile tea, can also be beneficial. Understanding and managing your cortisol rhythm is crucial for overall health, mood, and cognitive function. By implementing these strategies, you can improve your energy levels, focus, and sleep quality. Thank you for joining today's discussion on cortisol. If you enjoyed this episode, please subscribe and check out the sponsors mentioned.