Can vitamin D deficiency cause hair loss?

Hair follicles change through natural growth and resting phases. Illness, nutritional problems, hormonal changes, stress, inherited pattern hair loss, scalp inflammation, and some medicines can alter that cycle. Low vitamin D may be found alongside certain types of shedding, but finding a low level does not prove it is the only cause. Notice whether loss is diffuse or patchy, whether the scalp is itchy or inflamed, and when shedding began. These details help a clinician distinguish shedding from breakage or a scalp disorder.

Book a routine appointment if shedding continues, becomes noticeable, or affects your confidence. Bring a list of supplements and medicines, recent illnesses, dietary restrictions, and any family history of hair loss. A clinician may examine the scalp and request tests guided by your history, which can include vitamin and blood assessments. Eat regular meals with adequate protein and avoid crash dieting. Handle wet hair gently and avoid tight styles or repeated chemical treatments while the cause is being explored. Do not start large vitamin doses as a hair treatment without advice.

Arrange prompt review for sudden or rapidly expanding patches, scalp pain, scaling, redness, or pus. Seek urgent help for hair loss accompanied by severe illness, facial swelling, breathing difficulty, or a serious allergic reaction. Hair loss with fatigue, low mood, or generalised weakness deserves a broader health assessment rather than self-treatment alone.

Ask what pattern of hair loss you have, whether vitamin D testing is useful, which other causes should be checked, and how long to monitor shedding after treatment.