Shellfish is another delicious way to boost the health of your hair. Especially prawns and lobsters offer plenty of Omega-3 fatty acids as well as vitamin D3, which is a very important nutrient during the winter months. Vitamin D deficiencies are linked with hair loss and a reduction in hair vitality. Keep in mind that 40-60% of the people living in cold climates suffer from vitamin D deficiencies during the winter.