Hair Health and Nutrition
- Sarah Devine
- Jul 24
- 1 min read
Is Your Hair Loss Linked to a Vitamin Deficiency? Here's What You Need to Know
A deficiency in certain vitamins can contribute to hair loss. Hair growth relies on a variety of nutrients to support the hair follicle cycle, and when the body lacks specific vitamins or minerals, it can disrupt this process
The most commonly linked deficiencies include:
1. Vitamin D
Plays a role in hair follicle cycling.
Low levels have been associated with alopecia areata and general hair thinning.
2. Iron
Essential for oxygen transport to hair follicles.
Iron deficiency (even without anemia) is one of the most common causes of hair loss in women.
3. Biotin (Vitamin B7)
Supports keratin production and hair health.
Deficiency is rare but can cause hair thinning and breakage.
4. Zinc
Important for hair tissue growth and repair.
Deficiency may lead to hair shedding or scalp issues.
5. Vitamin B12
Helps form red blood cells and supports oxygen delivery to the scalp.
Low levels can cause hair loss and fatigue.
6. Vitamin A
Needed in small amounts for cell growth, including hair.
Both deficiency and excess can cause hair loss.
7. Folate (Vitamin B9)
Works with B12 in red blood cell production.
Deficiency can indirectly affect hair growth.
If you're experiencing hair loss, it's worth speaking to a healthcare provider about blood tests to check for these deficiencies.




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