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Autophagy: Our Innate Tool for Optimal Health and Fitness

Updated: Apr 9


In the fascinating realm of human biology, there is a remarkable cellular process that holds a key to our vitality and longevity – autophagy. Pronounced "aw-tof-uh-jee," this intricate biological mechanism plays a pivotal role in our bodies, working quietly behind the scenes to clean house and rejuvenate our cells.

Unfortunately, our modern lifestyles often overwhelm our body’s natural defenses, such as autophagy, with self-inflicted wounds; poor nutrition, long feeding windows which don’t allow our digestive system to rest/repair and which also block metabolic switching to our fat-burning mode, lack of exercise, poor sleep, excessive stress, and exposure to environmental toxins. In this blog, we'll dive deep into autophagy, exploring its functions, its remarkable health-rejuvenating features, and the most effective way to induce it – Multi-Day Fasting.


The Marvelous Mechanism of Autophagy

Autophagy, derived from the Greek words "auto" (self) and "phagein" (to eat), is a highly orchestrated cellular process that acts as a biological recycling program. The process was first identified in 1963, with a more complete understanding of its biological mechanisms not coming until 2014. Both physiologists who did the pioneering work on autophagy received Nobel Prizes for their findings. Yes, it is that important, and most of us haven't even heard of it!


The primary function of autophagy is to eliminate damaged or malfunctioning cellular components, such as old/inefficient organelles and mis-folded proteins, while simultaneously providing essential building blocks for the regeneration of new, healthy structures. Think of it as your cellular garbage disposal and recycling center combined.

As our personal lifestyle mistakes accumulate ("I have been living on pizza and beer this week!") and as we naturally age, the efficiency of autophagy tends to decline, leading to the accumulation of damaged cellular components. This accumulation is linked to a wide array of lifestyle-influenced and age-related diseases, including neurodegenerative disorders, cancer, systemic inflammation, and cardiovascular diseases.


Health-Promoting Features of Autophagy

The benefits of autophagy extend far beyond cell maintenance. When autophagy is activated, it triggers a cascade of events that can profoundly impact our overall health:

Cellular Rejuvenation: By removing damaged components and recycling them, autophagy helps rejuvenate cells, which can enhance their function and lifespan.


Immune System Support: Autophagy plays a vital role in removing intracellular pathogens and dysfunctional immune cells, bolstering our immune response.

Cancer Prevention: Autophagy can help prevent the formation of cancerous cells by eliminating damaged DNA and proteins that could trigger uncontrolled cell growth.

Neurological Health: It appears to protect against neurodegenerative diseases like Alzheimer's and Parkinson's by clearing toxic protein aggregates in the brain.

Metabolic Health: Autophagy can improve insulin sensitivity, regulate blood sugar levels, and support healthy weight management.

Mental Health: Recent research suggests that mitochondrial autophagy, Mitophagy, has the potential to reduce symptoms of major mental illnesses (Dr. Chris Palmer), and when induced over years through a ketogenic fast-mimicking diet, can result in remission of many cases of mental conditions.


Inducing Autophagy for Personal Health and Fitness

Now that we understand the incredible benefits of autophagy, the next question is how to activate this powerful tool in our body. While there are several strategies, the most potent method for inducing the highest levels of autophagy is Multi-Day Fasting.

Multi-Day Fasting: Our body’s natural design is to respond to nutrient deprivation with increased autophagy, and fasting induces the process with a cascade of health promoting benefits. During fasting, especially extended fasts lasting 72 hours or more, our body enters a state of nutrient deprivation. In response, it starts to break down its own cellular components, recycling them for energy. Cells improve their energy efficiency dramatically under these conditions of low energy input. The multi-day fasting process stimulates autophagy on a “Spring Cleaning” grand scale, amplifying its rate of activity and achieving activation in more organ systems throughout your body than any other method.

Intermittent Fasting: Intermittent fasting regimens, such as time-restricted eating, can also promote increased autophagy in our bodies. Extended periods of intermittent fasting, 12 to 18 hours, trigger autophagy as the body adapts to the fasting state. Recent studies suggest higher levels of autophagy begin after around 17 hours fasting for most people, and increase even more the longer you fast.

Exercise: Physical activity induces autophagy, especially endurance exercise and resistance training. Some research has found High Intensity Interval Training as one of the most effective exercise strategies to amplify autophagy. Exercise-induced autophagy helps in maintaining muscle health and cellular homeostasis.

Dietary Factors: Certain dietary components, such as polyphenols (found in fruits, vegetables, and tea) and omega-3 fatty acids, can activate autophagy. Additionally, the ketogenic diet, which is low in carbohydrates and high in fats, may promote autophagy. (The long-term use of a ketogenic diet, while beneficial for short-term weight loss and blood sugar control, can have several negative effects and risks.)

Pharmacological Agents: Drugs like rapamycin, metformin, and resveratrol have been investigated for their potential to enhance autophagy and promote health benefits. However, their use should be carefully monitored and discussed with a healthcare provider. Additionally, black coffee and teas have been found to induce autophagy (use no caloric additives). Moderate coffee consumption of up to about 3 or 4 cups is considered safe for most healthy adults. However, caffeine sensitivity can vary greatly between individuals, and consuming too much caffeine during your fasting period can lead to negative side effects like jitteriness, anxiety, and disrupted sleep. The active ingredients in caffeine take about 8 hours to fully metabolize in most people, so keep this in mind as to when you have your last cup.

In conclusion, autophagy is a remarkable biological process that promotes overall health and longevity by cleansing and rejuvenating our cells. To harness its full potential, Multi-Day Fasting stands alone as the most potent method we can use to unlock this innate healing tool in our bodies. Mult-Day Fasting prompts autophagy to surge in activation and reach deeply throughout our body, helping us achieve optimal health and fitness. However, it is important to approach fasting with caution and consult a healthcare professional if you have underlying health conditions. Ideally, our journey to Our Best Selves will make use of all the tools at our disposal to unlock the healing potential of autophagy; multi-day fasting, intermittent fasting, exercise, and healthy nutrition. With the right guidance, you can release the remarkable power of autophagy to achieve a healthier, more vibrant you.

At Fasting and Thriving Retreats we strive to bring you relevant information regarding a holistic approach to healthy living. A Fasting Lifestyle will help jump start your journey into health.

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