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Hydration, Gut Health, and Hair Strength

By the EllaDx team · Updated November 1, 2026 · 1 min read

For education only, not a diagnosis. Talk to your clinician about your results.

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Strong, healthy hair requires more than the right shampoo. Hydration and gut health play crucial roles in hair growth and quality.

Hydration and Hair

Hair is about 25% water. Dehydration can affect:

  • Hair shaft flexibility (dry, brittle hair)
  • Scalp health
  • Nutrient delivery to follicles

Signs Dehydration May Be Affecting Hair

  • Dry, frizzy hair
  • Lack of shine
  • Increased breakage
  • Dry, itchy scalp

Gut Health and Hair

Your gut can affect hair through:

  • Nutrient absorption
  • Inflammation levels
  • Hormone metabolism
  • Immune function

Gut Issues That Can Affect Hair

  • Celiac disease
  • IBD
  • SIBO
  • Food intolerances
  • Dysbiosis

Signs Gut Health May Be Affecting Hair

  • Hair loss with GI symptoms
  • Nutrient deficiencies despite good diet
  • Bloating, irregular bowels
  • Autoimmune hair loss

Testing for Gut Issues

  • Celiac panel (tTG-IgA, total IgA)
  • Inflammatory markers (CRP, ESR)
  • Nutrient levels (B12, iron, zinc, vitamin D)
  • Complete blood count

Action Steps

1. Ensure adequate hydration 2. Address any GI symptoms 3. Test for celiac disease if hair loss is unexplained 4. Consider gut healing protocols if other signs present

References

  • Pham, C. T., et al. (2017). Association between celiac disease and alopecia areata: a systematic review and meta-analysis. Nutrients, 9(9), 970.