Fasting & Health

Fasting & Health

The science behind it and how to do it right - Explore the benefits of fasting, what happens in the body, and how you can support your fast with the right nutrients

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Why do millions choose fasting for better health?

Fasting has been practiced for thousands of years, whether for religious, cultural, or health-related reasons.

Modern research has shown that fasting can have a range of health benefits, including improved metabolism, increased energy, and mental clarity. Whether you fast for spiritual reasons or for the health benefits, it is important to do it properly to get the most out of it.

Scientific Benefits

Autophagy and cell renewal – The body starts a natural cleansing process in which it breaks down and recycles damaged cells. (Yoshinori Ohsumi, Nobel Prize winner in Medicine 2016).
Improved metabolism – Fasting can increase insulin sensitivity and help stabilize blood sugar. (New England Journal of Medicine, 2019).
Mental clarity and focus – Many people experience improved cognitive function during fasting, as ketone production provides a more stable energy source for the brain. (Cell Metabolism, 2021).

DID YOU KNOW THIS ABOUT FASTING?

1. Fasting can trigger autophagy – the body’s cell renewal process.


2. Fasting can contribute to stable blood sugar and better insulin sensitivity.


3. Fasting can reduce inflammation and support mental clarity.

What happens in the body during fasting?

12

After 12 hours, the body uses its glucose stores and insulin production decreases.

24

After 24 hours, the body begins producing ketones, which give the brain a more stable energy source. Autophagy starts.

48

After 48 hours, the immune system is strengthened, inflammation can be reduced, and growth hormone production increases. Deep cell renewal. Stem cell production can increase, and the body repairs itself.

What happens in the body during fasting?

When you fast, a number of biological processes take place that promote health and renewal:

Autophagy – The body’s own detox

Autophagy is the body’s natural process for breaking down and recycling damaged cells. This helps with:
✔ Removal of waste products and toxins
✔ Reduced inflammation in the body
✔ Better cell renewal and healthier aging processes

Ketosis – Efficient fat burning

After about 12-16 hours without food, the body begins to use fat as its primary energy source. This is called ketosis and contributes to:
✔ Stable energy levels without blood sugar dips
✔ Increased mental sharpness
✔ Efficient fat burning

Hormonal balance and metabolism

Fasting affects our hormones positively:
✔ Increases growth hormone production – important for muscle preservation and fat burning
✔ Improves insulin sensitivity – reduces the risk of diabetes and metabolic syndrome
✔ Regulates hunger and satiety hormones, which can make it easier to eat a balanced diet

The benefits of fasting

Increased energy and mental clarity – Many people experience better focus and productivity when the body avoids frequent blood sugar fluctuations.


Strengthened immune system – Autophagy helps break down damaged immune cells and create new, strong cells.

Supports gut health – Fasting gives the digestive system a break and contributes to a healthier gut flora.

Long-term health benefits – Studies show that fasting can reduce the risk of chronic diseases such as heart disease and neurodegenerative disorders.

Chromium: The nutrient that helps curb sugar cravings and overeating

Many people who fast or try to regulate their food intake experience sugar cravings and uncontrolled appetite after long periods without food. Chromium is an important trace mineral that plays a central role in blood sugar regulation and can be key to avoiding overeating.

How does chromium work?

Stabilizes blood sugar
Chromium helps your cells absorb glucose more efficiently, which prevents sudden drops in blood sugar. When blood sugar is stable, the need for quick carbohydrates and sugary foods is reduced.

Reduces sugar cravings
Chromium affects how insulin works and can therefore reduce sudden cravings for sweets and fast carbohydrates. This is especially useful after fasting, when the body is seeking quick energy.

Improves satiety
Studies show that chromium can help regulate appetite and provide a better feeling of fullness, reducing the risk of overeating after fasting.

Supports weight loss
By balancing blood sugar and reducing the need for frequent meals, chromium can contribute to healthier eating habits and weight loss over time.

How to use chromium for best effect?

For optimal support, it is recommended to take chromium supplements either before fasting or after meals to stabilize blood sugar and avoid uncontrolled overeating. It can also be combined with other important nutrients such as magnesium and electrolytes to provide the body with a steady flow of energy.

Common mistakes & how to avoid them

Fasting offers many benefits, but it can also lead to discomfort and reduced effectiveness if not done properly. Many people experience headaches, dizziness, or exhaustion, for example, due to a lack of electrolytes. This often happens because the body loses important minerals such as sodium, potassium, and magnesium during fasting, which can affect both energy levels and mental sharpness.

Another common mistake is breaking the fast with heavy, hard-to-digest foods, which can cause digestive issues and energy dips. By starting with easily digestible nutrients such as fruit, dates, and protein in small amounts, you can reduce the risk of discomfort and help the body adjust gradually.

⚠️ Mistake 1: Not enough electrolytes ➔ Can lead to headaches and dizziness.

Solution: Drink enough water with magnesium drops and electrolytes to avoid dehydration.

⚠️ Mistake 2: Breaking the fast with heavy, hard-to-digest foods ➔ Can cause stomach problems.

Solution: Start with easily digestible foods such as fruit, dates, and protein in small amounts.

⚠️ Mistake 3: Too little sleep during fasting ➔ Can reduce the positive effects.

Solution: Magnesium can help improve sleep quality and reduce stress.

Myths about fasting

"You lose muscle mass when fasting."Wrong! The body preserves muscle through increased growth hormone production.

"Fasting makes you tired and weak."Wrong! Many experience increased energy and mental sharpness after adapting.

"You should eat often to keep your metabolism high."Wrong! Studies show that fasting can actually increase

"Electrolytes are important during fasting"Yes! A lack of electrolytes can lead to headaches and dizziness.

Why supplements are important before and after fasting

Fasting gives the body the opportunity to cleanse itself, stimulate cell renewal, and improve metabolism. But for the body to function optimally, it needs the right nutrients. If you enter a fasting period with a deficiency in important minerals and vitamins, it can lead to a range of health challenges.

What happens when you lack important nutrients?

Electrolyte deficiency: Headache, dizziness, and fatigue

Electrolytes such as sodium, potassium, and magnesium regulate fluid balance and nerve impulses. If you are deficient before fasting, it can lead to:

  • Dehydration – the body loses water faster, which can cause headache and dizziness.
  • Muscle cramps – without enough magnesium and potassium, the muscles can contract uncontrollably.
  • Fatigue and confusion – the cells struggle to send electrical signals, which affects mental clarity.

Magnesium deficiency: Stress, poor sleep, and muscle tension

Magnesium is essential for energy, the nervous system, and sleep quality. Too low levels can cause:

  • Sleep problems – low magnesium makes it hard to relax and fall asleep.
  • Increased stress – magnesium deficiency can lead to higher cortisol levels, making you more tense.
  • Muscle tension – increased risk of stiffness and cramps.

Iodine deficiency: Low energy and hormonal imbalance

Iodine supports the thyroid, which regulates metabolism. A deficiency can lead to:

  • Low energy and fatigue – the body does not produce enough metabolic hormones.
  • Weight gain or difficulty burning fat – the thyroid slows down metabolism.
  • Hormonal imbalances – women may experience irregular menstruation, while men may have lower testosterone levels.

Chromium deficiency: Overeating and unstable blood sugar

Chromium helps the body regulate blood sugar. A deficiency can lead to:

  • Increased sugar cravings – the body struggles to stabilize blood sugar, leading to a strong craving for sugary foods after fasting.
  • Overeating – unstable blood sugar can make it difficult to control food intake.
  • Energy spikes and crashes – unstable blood sugar causes periods of extreme energy followed by exhaustion.

Silicon deficiency: Weak joints, poor skin, and slow recovery

Silicon is important for maintaining healthy skin, joints, and connective tissue. A deficiency can lead to:

  • Poor skin quality – the skin loses elasticity and becomes dry.
  • Increased risk of joint pain – connective tissue weakens, affecting mobility and recovery.
  • Slower regeneration – the body takes longer to repair damage.

How can you support the body during fasting with the right nutrients?

Fasting is a powerful method for strengthening the body's regeneration and detoxification. By providing the right nutrients before and after fasting, you can optimize energy, hydration, and recovery. Here are the best supplements from PureNordic to support your body in this process.

Before fasting: Prepare the body for a balanced transition

Electrolytes – Hydration and energy

Start the day with electrolytes to replenish fluid balance after the night's fast. Proper hydration:
✔ Reduces fatigue and headaches
✔ Supports the body's natural detoxification
✔ Makes it easier to manage thirst throughout the day

Magnesium – For focus and calm

Magnesium is essential for energy and mental balance. During fasting, it helps to:
✔ Reduce stress and irritability
✔ Improve concentration and productivity
✔ Promote recovery and stable energy levels

Iodine – For hormonal balance and metabolism

Iodine supports the thyroid gland, the body's “battery”, and helps increase energy levels. It also helps with:
✔ Hormone regulation and metabolism
✔ Fertility and hormonal balance in women
✔ Testosterone production and muscle growth in men

After fasting: Optimal nutrition for regeneration

Digestive support – Gentle transition after fasting

After a full day without food, the digestive system needs support. This supplement helps to:
✔ Improve digestion and reduce bloating
✔ Prevent overeating and heavy, hard-to-digest meals
✔ Support the liver’s natural detoxification process

Mitochondria Energy Formula – Energy at the cellular level

During fasting, autophagy is activated, the body’s natural process for removing damaged cells and regenerating new ones. Mitochondria Energy Formula supports:
✔ Efficient fat burning and energy metabolism
✔ Stable energy levels throughout the day
✔ Detoxification of heavy metals

Chromium – Control over sugar cravings and overeating

After fasting, the body is in a natural regeneration phase. Chromium helps the body stabilize blood sugar, reducing the risk of overeating after fasting. It: ¨

✔ Reduces sugar cravings and prevents uncontrolled food intake
✔ Supports balanced energy levels
✔ Contributes to better appetite control

Have questions? Contact us!

Paulina Borkowska

Email: info@purenordic.life

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