Tea Tree Oil in Shampoo: Safe Dilution (0.5% Max)

Tea tree oil is potent; use low concentrations to avoid irritation.

  • Standard dilution: 5 drops per 100 mL shampoo ≈ 0.5%.
  • Sensitive skin/scalp: Start with 2–3 drops per 100 mL (0.2–0.3%).

Patch-test before full use. Discontinue if redness, itching, or burning occurs.

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