Ultimate Omega-D3 provides exceptionally high levels of the omega-3 essential fatty acids EPA and DHA, in addition to 1000 I.U. of vitamin D3, in one delicious serving. Vitamin D3 (or cholecalciferol) is the natural form of vitamin D produced by the body, and is better absorbed and utilised than other forms. visit us : http://www.tasmanhealth.co.nz/nordic-naturals-ulti mate-omega-d3/ for more details!!