What it does
Helps enzymes process fats, carbohydrates and amino acids.
Possible deficiency symptoms
Rare deficiency may cause hair thinning, rash and neurological symptoms. Hair loss alone does not establish deficiency.
Food sources
Cooked eggs; nuts; seeds; fish; meats.
Supplement forms
Biotin (vitamin B7).
Before taking a supplement
Biotin supplements can distort some thyroid, hormone and heart-related lab tests. Tell the testing team about your intake.
Questions for your visit
Could my diet, medicines, absorption or another condition explain my concern? What evidence would support treatment, and how would we check whether it helps?
Names you may see
Biotin
Sources & perspective
This is an editorial adaptation of the Purser Wellness nutrient reference app. Purser teaching connections are labeled separately from clinical interpretation. Private cases and individual treatment protocols are not reproduced.
Use the public resources below for additional context.
NIH Office of Dietary Supplements: Biotin
