Lao Tzu said:You don't really need a supplement for omega-6s unless you are eating an extremely strict diet. Western diets are full of omega-6s.
danbo - A normal 1000mg serving of fish oil has 300mg of Omega-3s in it, 180mg EPA and 120MG DHA. That would work out to 3600mg EPA and 2400mg DHA a day. So if you take extra potent oils you need to calculate out how much you need to reach those levels.
The ratio of omega 6 to omega 3 is supposed to be anywhere from 4:1 up to 1:2. I don't know where you guys are going to get your extra 20g a day of unsaturated fats the diet calls for but not getting enough omega 6s to counteract the omega 3s could be bad too. You'd be eating 6g a day of omega 3 on this diet. Peanuts are high in omega 6s.
Typical modern diets are so high in omega 6s it probably wouldnt be a problem average diets have up to 20:1 ratio.
However The diet is wrong to recommend that much omega 3 I couldnt care if it was caleed the "skinny pencilneck ethiopians look fat compared to me i blow away in the wind diet" it will not put on the mass for you but even be a hinderance.