1. Complete Blood Count (CBC):
- Hemoglobin: <12 g/dL (women), <13 g/dL (men) suggests anemia.
- MCV: <80 fL (iron deficiency), >100 fL (B12/folate deficiency). 1a)
1a. Liver Function Tests (LFT) for Hair Fall
- ALT/AST: >40 IU/L suggests liver dysfunction, potentially affecting hair metabolism.
- Albumin: <3.5 g/dL may indicate nutritional deficiencies linked to hair loss.
- Bilirubin (Total): >1.2 mg/dL could signal underlying systemic issues.
2. Thyroid Function Tests:
- TSH: >4.5 μIU/mL (hypothyroidism), <0.5 μIU/mL (hyperthyroidism).
- Free T4: <0.9 ng/dL (hypothyroidism), >2.5 ng/dL (hyperthyroidism).
3. Iron Studies:
- Ferritin: <30 ng/mL indicates iron deficiency.
- TIBC: >450 μg/dL suggests low iron stores.
4. Vitamin Levels:
- Vitamin D: <20 ng/mL (deficient).
- Vitamin B12: <200 pg/mL (deficient).
- Zinc: <70 μg/dL affects hair health.
5. Hormonal Tests:
- DHEA-S: Elevated (>430 μg/dL in women) suggests PCOS.
- Testosterone (Total): >70 ng/dL in women indicates androgen excess.
- Cortisol: >23 μg/dL indicates stress-induced hair loss.
6. Liver & Kidney Function:
- Liver Enzymes (AST/ALT): >40 IU/L suggests dysfunction.
- Creatinine: >1.2 mg/dL indicates kidney issues.
7. Autoimmune Markers:
- ANA (Titer): >1:40 indicates autoimmune causes like alopecia areata.
