Tea Tree oil

• In 2002 the Journal of the Academy of Dermatology published a placebo-controlled study of 126 subjects which found that 5 percent tea tree oil used daily for 4 weeks improved dandruff by an average of 41 percent, compared to an 11 percent improvement in the placebo group. No adverse effects seen. [Source]

Honey

• In 2001 the European Journal of Medical Research published a study in which 30 patients with severe seborrheic dermatitis of the face, scalp and chest gently rubbed 90 percent crude (raw, unrefined) honey diluted with 10 percent warm water every other day on seborrheic dermatitis skin lesions for 2-3 minutes, then let the honey set for 3 hours before rinsing with warm water. After 4 weeks all patients had a significant reduction in itching; scaling disappeared within one week and skin lesions were healed completely within 2 weeks. All patients treated with honey once monthly (for 6 months) after the initial 4-week treatment did not relapse. [Source]