Flaxseed oil- no EPA or DHA present, only the precursor ALA which must be converted to EPA.
Walnut oil- no EPA or DHA present, only the precursor ALA which must be converted to EPA.
Camelina oil- no EPA or DHA present. Very high in omega-6 and ALA.
Sardine/ Anchovy oil- has DHA but must be subjected to molecular distillation for purity.
Herring oil- has DHA but must be subjected to molecular distillation for purity.
Menhadden oil- has DHA but must be subjected to molecular distillation for purity.
Atlantic salmon oil- farmed fish, has DHA but must be subjected to molecular distillation for purity.
Wild Alaskan salmon oil- excellent source of DHA, more pure than others even without molecular distillation.
Wild Alaskan Pollock oil- excellent source of EPA and DHA with the same purity as our wild Alaskan salmon oil.
Krill oil- source of DHA. High cost, limited availability, very low levels of EPA & DHA. Whales depend on this biomass.
Algal oil- excellent source of DHA. High cost, limited stability- very short shelf-life.