In addition to regular shampooing, try these steps to reduce your risk of dandruff: 1. Manage stress. It can trigger dandruff or make it worse. 2. Cut back on hair sprays, styling gels and mousses. They can build up on your hair and scalp, making them oilier. 3. Eat a healthy diet. Nutrients such as zinc, B vitamins and essential fatty acids may help prevent dandruff.