The symptoms of biotin deficiency can manifest in various ways, affecting different systems within the body. Some common symptoms include thinning hair or hair loss, brittle nails, skin rashes or dermatitis, neurological issues such as depression, lethargy, hallucinations, and tingling sensations in the extremities. Recognizing these symptoms is crucial for early intervention and treatment.

Diagnosing biotin deficiency often involves a combination of clinical assessment, physical examination, and laboratory tests. Blood tests to measure biotin levels, as well as tests to evaluate the levels of certain enzymes that rely on biotin, can help confirm the deficiency. Additionally, symptoms and dietary history play a significant role in diagnosis.

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