Intermittent Fasting and Hair Growth: What You Need to Know

Intermittent fasting (IF) has become super popular for its benefits – weight loss, improved metabolism, and cellular repair. But many wonder about intermittent fasting and hair growth. Does intermittent fasting promote hair health? Or may intermittent fasting contribute to hair thinning?

Recent research shows that while IF has many health benefits, it can also affect the hair growth cycle in some people. In this guide, we’ll look into intermittent fasting and hair growth, why some people experience hair loss during intermittent fasting, and how you can support healthy hair while following an IF regimen.

Does Intermittent Fasting Affect Hair Growth?

Hair growth is a complex process that’s influenced by nutrition, hormones, and overall health. While intermittent fasting has potential health benefits, studies show it can also have side effects – including temporary hair shedding.

The Science Behind Intermittent Fasting and Hair Growth

A study by Westlake University in China looked into the effects of intermittent fasting on hair regrowth. They had two groups of mice:

• Control Group: Mice with unlimited food regrew their hair in 30 days.
• Fasting Group: Mice with a 16-hour fasting window only showed partial hair regrowth after 96 days.

The delayed hair growth in fasting mice was due to stress on hair follicle stem cells, which regulate the hair growth cycle. Prolonged fasting pushed some follicles into a dormant phase or caused them to die.

How This Applies to Humans

The same study observed a small human trial with 49 participants. Those who practiced intermittent fasting had an 18% reduction in hair growth. Results varied based on individual genetics, metabolism, and overall health.

Why Does Intermittent Fasting Cause Hair Loss?

Hair loss during fasting may be caused by:

1. Nutrient Deficiency
   • Fasting reduces the time to absorb key hair-supporting nutrients like biotin, iron, zinc, and protein.
   • Deficiencies in these nutrients can weaken hair follicles and lead to hair loss.
   • Fasting can trigger physiological stress and cortisol spikes. Elevated cortisol is linked to telogen effluvium, a temporary condition that causes excessive hair shedding.
2. Reduced Blood Flow to Hair Follicles
   • IF can impact circulation and limit oxygen and nutrient supply to hair follicles.
   • Poor circulation can lead to weak hair strands and slower regrowth.
3. Hormonal Imbalances
   • IF affects insulin levels, thyroid function, and androgens, all of which impact hair health.
   • Some people may experience hormone-driven hair thinning as a result.

Intermittent Fasting Benefits for Hair

Despite hair loss concerns, early research shows that intermittent fasting may indirectly benefit hair growth in the long term.

1. Supports Cellular Repair (Autophagy)

Intermittent fasting triggers autophagy, the body’s natural process of cellular detoxification and repair. This may help the health of hair follicles and prevent damage from oxidative stress.

2. Regulates Hormones That Impact Hair Growth

• Balances insulin levels to prevent hormone-driven hair loss.
• Boosts human growth hormone (HGH), which plays a role in cell regeneration and follicle repair.

3. Reduces Inflammation That Contributes to Hair Loss

• Chronic inflammation can weaken hair follicles and lead to shedding.
• IF has been shown to lower systemic inflammation, which may mean stronger, healthier hair.

How to Prevent Hair Loss While Fasting

If you’re doing intermittent fasting for hair growth, here’s how to minimize hair thinning:

1. Prioritize Nutrient-Dense Foods During Eating Windows

To prevent deficiencies, make sure your meals include:

• Protein-rich foods (chicken, fish, eggs, tofu)
• Iron and zinc sources (spinach, lentils, red meat, nuts)
• Healthy fats (avocados, olive oil, salmon)
• B vitamins and biotin (whole grains, eggs, nuts)

2. Consider Hair Growth Supplements. Biotin (Vitamin B7) – Keratin production.

• Biotin (Vitamin B7) – Keratin production.
• Iron – Prevents hair shedding due to deficiency.
• Omega-3 fatty acids – Nourish the scalp and hair follicles.
• Collagen peptides – Strengthen hair strands.

Shop Bosley Hair Growth Supplements 

3. Don’t Starve Yourself

• Eat enough calories during your eating window.
• Avoid fasting for too long, as it can cause nutrient depletion.
• If you see excessive shedding, consider adjusting your fasting protocol.

5. Explore Hair Growth Treatments

If hair thinning persists, consider hair restoration options:

• Prescription Hair Loss Meds
• Low-Level Laser Therapy
• Hair Transplant

Conclusion

Intermittent fasting has both benefits and drawbacks for hair. It can support cell regeneration and hormone balance, but nutrient deficiency and stress can cause hair loss during intermittent fasting.

Get Healthier Hair Now!

Schedule a free consultation with Bosley here.