I have struggled to raise my chronically low "good" cholesterol (HDL) for many years, with efforts including taking the regular Natural Factors Rx-Omega 3 product (without flaxseed oil). My bad cholestrols decreased, but the HDL would not budge. I switched to this "fish and flax" formula two months ago, and my HDL is at a healthy level (42) for the first time in my life! Switching to this product was the only change in my daily regimen during this time. Thank you iHerb and Natural Factors!