Which Vitamin or Mineral Deficiencies Can Cause Hair Loss?
Quick answer: Low iron (ferritin) is the deficiency most often linked with hair shedding, and low vitamin D, zinc, protein and sometimes B12 are also checked; get a blood test before taking supplements, because too much of some nutrients can also cause problems.
- Iron: Especially in women with heavy periods.
- Protein and diet: Crash diets can trigger shedding.
- Test first: A doctor can order the right tests.
Frequently asked questions
Does biotin help?
Mainly if you are deficient, which is uncommon.
Can supplements hurt?
Excess vitamin A or selenium can contribute to loss.
Which doctor?
A GP first.
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Related reading
- Why Is My Hair Falling Out So Much?
- Can Stress Really Cause Hair Loss?
- How Long Does Postpartum Hair Loss Last?
- What Are the Early Signs of a Receding Hairline?
- Hair loss library: Causes of hair loss
Reviewed by the Folli-Doc team, led by Dr. Steven Goh (6 years’ experience in hair density treatment). This article is general information, not a medical diagnosis; for sudden, patchy or painful hair loss, see a doctor or dermatologist.