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Hello Capilli AI Community,

The connection between the gut and hair is often overlooked, but it’s real and significant. This is known as the gut-hair axis. When your digestive system is out of balance, it can quietly lead to hair thinning, increased shedding, slowed growth, and reduced strand quality, even if your diet looks “healthy” on the surface.

In this edition of Foundations of Healthy Hair, we break down how your gut affects your hair, what signs to look for, and how to support both systems together.

How Gut Health Impacts Hair

Your gut does more than digest food. It regulates inflammation, hormone balance, and nutrient absorption, all of which directly impact the scalp and follicles.

When gut health is compromised, you may experience:

• Poor absorption of key nutrients (iron, zinc, B vitamins, protein)

• Chronic inflammation that affects hair growth cycles

• Increased stress hormone levels and immune dysregulation

• Reduced blood flow and oxygenation to the scalp

This can show up as:

• Increased daily shedding

• Slower regrowth after hair loss

• Fine, weak, or brittle strands

• Itchy, inflamed, or dry scalp

Common Gut-Driven Hair Issues

Some contributors to gut imbalance that also affect hair include:

• Frequent bloating or irregular digestion

• Long-term antibiotic use

• Processed foods, alcohol, low fiber

• Food sensitivities (e.g. gluten, dairy)

• Stress, which impacts the gut lining and microbiome

Gut distress may come before noticeable hair changes, so early signs matter.

How to Support Your Gut for Better Hair

Supporting your gut may lead to better nutrient delivery, reduced scalp inflammation, and stronger hair growth from the root.

Helpful changes:

• Increase prebiotic fibers: garlic, leeks, oats, asparagus, bananas

• Add probiotic-rich foods: yogurt, kefir, kimchi, sauerkraut

• Eat enough protein and iron: these are essential for keratin production and follicle activity

• Reduce sugar, alcohol, and ultra-processed foods

• Stay hydrated to help nutrient transport and elimination

• Consider stress reduction habits like breathwork, journaling, or gentle movement

AI Spotlight: Tracking Hair Outcomes Through Gut Insights

AI is beginning to connect daily digestive symptoms with hair health over time.

By integrating food logs, microbiome data, and hair condition reporting, AI platforms can:

• Identify patterns between gut distress and hair shedding

• Suggest targeted prebiotic or probiotic protocols

• Correlate nutrient intake with regrowth speed or scalp irritation

• Help users personalise diets based on hair feedback loops

This allows for smarter, more adaptive care, especially in chronic or unexplained hair issues.

Practical Takeaways:

• The gut and hair are connected through inflammation, nutrients, and hormones

• Digestive health plays a key role in the strength and growth of your hair

• Addressing your gut may restore clarity to unexplained hair concerns

• AI tools make tracking and refining easier than ever

What’s Next?

In the next edition of Foundations of Radiant Skin, we’ll explore how hormones like estrogen, cortisol, and androgens shape your skin’s behavior across time. From breakouts and dryness to glow and elasticity, we’ll break down how internal shifts affect your complexion, and how to work with them.

To your health and vitality,
The Capilli AI Team

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Disclaimer:

This newsletter is for informational purposes only and does not substitute professional medical advice. Always consult with a healthcare provider before making any changes to your health regimen.