Can Dehydration Cause Hair Loss?

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Can Dehydration Cause Hair Loss?

Visitor’s Question:

My friend (male) is losing so much hair, and they don’t know why. His fingernails show vertical creases and are very soft.

Now I have noticed that he only drinks about 1-2 glasses of water a day and nothing more! Could dehydration be a reason for his hair falling out?

Shuna’s Answer:

While dehydration can make hair dry and brittle, it’s unlikely to be the main reason for your friend’s hair loss. Drinking more water is definitely a good idea, as staying hydrated supports overall health, including the scalp, but there’s probably more going on here.

The creased, soft fingernails could point to a protein deficiency, an autoimmune condition, or something like low thyroid or vitamin B12 levels. It’s worth your friend getting these checked with a doctor.

As a trichologist, I see how stress and poor nutrient absorption can also lead to hair loss. For men, male pattern baldness or other scalp conditions like scarring alopecia could be factors too. A proper look at his hair and scalp would help figure out what’s happening and the best next steps.

If your friend’s ready, I’d be happy to see him for a consultation (Saturdays are available!). You’re welcome to come along for support.

Shuna Hammocks (MIT, MRSM) - Consultant Trichologist

Shuna Hammocks is a qualified Consultant Trichologist and Member of the Institute of Trichologists, MIT (Registration Number: 10060), with over 24 years of clinical experience. Trained under Philip Kingsley and Glenn Lyons (Past Chairman of the IoT), she provides an expert holistic approach for hair loss, alopecia, and scalp conditions.

All educational and clinical content is personally written and reviewed by Shuna to ensure accuracy and medical integrity. Read our AI Content Disclosure to learn more about our commitment to transparency and expert-led communication.

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