Symptoms & complaints
Hair loss and your blood
Hair loss can have many causes, from hereditary predisposition to a deficiency or a hormonal disturbance. Blood testing can reveal a number of treatable causes. Below you read which blood values are relevant.
Common, measurable causes
Iron deficiency (low ferritin), an underactive or overactive thyroid and a lack of vitamin D are regularly linked to hair loss. In women and men, hormonal factors can also play a role. An abnormal value does not always explain the symptom, and not all hair loss is visible in blood.
When testing is useful
With sudden or increasing hair loss, especially combined with other symptoms such as fatigue, targeted blood testing can provide direction. If in doubt or with persistent symptoms, a visit to the GP or dermatologist remains important.
Relevant blood values
Frequently asked questions
Which blood values relate to hair loss?
Often relevant are iron/ferritin, thyroid function, vitamin D and sometimes hormones. Which ones are useful depends on your situation.
Will my hair loss stop if I correct a deficiency?
If a deficiency is the cause, correcting it may help. Often several factors play a role. Discuss the result and any treatment with a doctor.
Do I need to fast?
For these markers fasting is usually not needed. If in doubt we advise fasting; see our guide on fasting.
Sources
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