While it is important to not shampoo too frequently so that you can have a healthier scalp and hair from the natural oils that your skin produces, if you don’t regularly wash your hair, oils and skin cells from your scalp can actually build up and cause dandruff. BEAUTY ARK’S CLEAN DANDRUFF OIL in Key ingredients: Tea Tree Oil is a preferred ingredient in anti-dandruff treatments. Since bacteria is one of the main causes of dandruff, tea tree oil is effective as it has natural antibacterial, antiseptic and anti-fungal properties that fight dandruff. Tea tree oil helps strengthen the hair and protects it from scalp infections, making it a key ingredient in daily-use hair products.