There is no clear evidence that omega 3 fats differ in effectiveness according to fish or plant sources, dietary or supplemental sources, dose or presence of placebo.
There are effectively no plant sources, except for algae.
25,000 years ago we consumed omega-3 and omega-6 precursors in a 1:1 ratio. Today, thanks to the widespread consumption of cereal grains and few sweetbread meats, that ratio is about 1:20. That has drastic implications for the production of essential lipids like EPA that the body cannot create on its own.
There are effectively no plant sources, except for algae.
25,000 years ago we consumed omega-3 and omega-6 precursors in a 1:1 ratio. Today, thanks to the widespread consumption of cereal grains and few sweetbread meats, that ratio is about 1:20. That has drastic implications for the production of essential lipids like EPA that the body cannot create on its own.