What Fasting Does to Growth Hormone

author avatar Dr. Eric Berg 12/09/2023

Fasting and Growth Hormone is a fascinating intersection of health and science.

Imagine, for a moment, that you could boost your body's natural anti-aging hormone simply by changing when you eat. Sounds too good to be true?

Well, research shows that Fasting and Growth Hormone levels are intimately connected - with fasting leading to significant increases in this vital hormone.

This revelation can revolutionize how we approach dieting, muscle building, fat loss, and aging!

The Role of Growth Hormones in Aging

Let's face it: aging is inevitable. But did you know that a particular hormone plays an integral role in how we age? You guessed right - it's the growth hormone.

Growth Hormones and Youthful Appearances

This mighty little protein does more than help us grow during our formative years. As we age, levels of this vital hormone decrease significantly. Sadly enough, these lower levels can lead to visible signs of aging.

Maintaining Proteins for Skin Health

In essence, growth hormones are responsible for preserving proteins affecting skin health. They keep your complexion fresh and youthful by promoting cell regeneration and repair.

Joints & Muscles: The Impact Of Lowered Growth Hormones

A decline in growth hormones also affects joints and muscles. This may result in stiffness or loss of flexibility over time.

Hair Loss And Reduced Growth Hormone Levels

Studies suggest lowered growth hormones could be part of the culprit if you've been noticing thinning hair with advancing age. Now, let's explore some benefits associated with maintaining healthy levels of this essential hormone.

Benefits of Growth Hormone

The growth hormone, often overlooked, plays a significant role in our bodies. Beyond its well-known anti-aging properties, it serves several other vital functions.

What causes hormone imbalances?

Burning Body Fat with Growth Hormone

Growth hormones are instrumental in burning body fat effectively.

Increasing Lean Muscle Mass through Growth Hormones

Growth hormones also help increase lean muscle mass and reduce fat storage. In addition to building new muscles,

How Fasting Influences the Production of Growth Hormone

You may be astonished to discover that fasting can significantly affect growth hormone production. A fascinating study revealed that even short-term fasting can dramatically increase your levels of this vital hormone.

Two-Day Fast Impact on Growth Hormones

Fasting can boost your growth hormones by up to 200% in just two days. Such an increase could have profound effects on muscle preservation and fat burning.

Three-Day Fast Effect on Boosting HGH Levels

If you extend your fast for another day, the results are even more impressive. A three-day fast increases these crucial hormones by as much as 300%.

Seven-Day Fast's Influence on Human GH

The most astounding fact is what happens when you commit to a seven-day fast. Your body rewards this dedication with a whopping 1250% rise in human growth hormone (HGH) levels.

As we've seen, strategic periods without food intake hold great potential for boosting our bodies' natural anti-aging mechanisms.

But how does all this tie into preserving muscles and inhibiting protein breakdown? Stay tuned; next up, we delve deeper into intermittent fasting's role in muscle preservation.

Fasting for Muscle Preservation & Protein Breakdown Inhibition

Ever wondered why fasting is touted as a magic bullet in the health and wellness sphere? It's time to uncover the mystery.

Muscle Preservation during Intermittent Fasting

The secret lies in its ability to preserve muscle mass - yes, you heard that right. Studies suggest intermittent fasting can be four times more effective in maintaining muscle mass than reducing caloric intake.

Inhibiting Protein Breakdown through Short-Term Fasting

This isn't just about maintaining those hard-earned biceps; there's more science behind this. During food deprivation (fasting) periods, your body goes into survival mode. It becomes highly efficient at inhibiting protein breakdown, known as catabolism.

This inhibition is crucial for retaining muscle and supports brain health and nervous system function. Now, how does all this work? Let me break it down for you:

  • Your body switches fuel sources from glucose (from carbs) to ketones (from fat).

When we fast intermittently or over shorter periods, the body produces ketone bodies. And guess what? These little molecules have neuroprotective benefits.

  • Ketone bodies provide an alternative energy source for our brains during starvation or when glucose levels drop significantly due to carbohydrate restriction.

Fascinating stuff, right? Don't be so quick to dismiss the idea of fasting - it may provide physical and mental benefits. They might be onto something incredibly beneficial both physically and mentally.

Dietary Recommendations for Proteins During Fasts

One of the most commonly posed queries regarding fasting is protein consumption. How much should you consume? Is there a need for additional supplements during fasts or before workouts?

The Ideal Protein Intake During Fasting Periods

To maintain optimal functioning during periods without food intake (fasting), consuming between .6-.8 grams per pound body weight per meal is recommended. This will make your fasting experience more comfortable.

No Need For Additional Supplements

Surprisingly, when engaging in intermittent fasting, you don't need to consume additional protein supplements before exercising. This will pave the way toward effective fat loss and lean muscle preservation.

Making The Most Out Of Your Meals
  • Favor high-quality sources like lean meats, eggs, dairy products, legumes, or plant-based options if vegan.

  • Avoid processed foods that often contain hidden sugars and unhealthy fats. They might compromise your efforts by spiking insulin levels, leading to potential weight gain.

  • Last but not least - hydration. Don't forget water plays an essential role in all metabolic processes, including digestion and absorption of nutrients. Remember: successful fasting isn't just about abstaining from eating; it's also about nourishing your body with what it needs when breaking those fasts.

Intermittent fasting concept

Fasting and Why Your Upper Arms Are Fat

Various factors can influence fat accumulation in specific body areas, such as the upper arms.

While fasting has gained popularity for its potential health benefits, including weight loss, it's essential to understand that spot reduction of fat through fasting alone is not possible.

Fat distribution in the body is influenced by genetics and overall body composition rather than specific dietary patterns like fasting.

Fasting may help create a calorie deficit, contributing to overall weight loss and potential reduction in body fat over time. However, where your body loses explicitly, fat is determined by genetic factors and individual variation.

To address concerns about fat in the upper arms or any other area, it's essential to focus on overall lifestyle factors.

Regular physical activity, strength training exercises targeting the arms, and maintaining a calorie deficit through a sustainable approach can contribute to overall fat loss and help improve body composition.


Understanding the relationship between Fasting and Growth Hormones is a game-changer. This natural anti-aging hormone can be boosted simply by changing when you eat. Fasting, in particular, has been shown to increase levels of this vital hormone significantly.

The benefits are many - from burning body fat to increasing lean muscle mass and even slowing aging!

Short-term or intermittent fasting results in better muscle preservation than being on a low-calorie diet alone does because it inhibits protein breakdown, known as catabolism.

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