Some more on omega-3's that I just read in Main Street Vegan, Victoria Moran, page 177:

"Studies that have compared omega-3 levels in subjects who took these [algae-based] supplements to those who took fish oil capsules show virtually identical results, and taking algae-based supplements also means you're avoiding the environmental contaminants that concentrate in the fatty tissues of fish. 'Algae is sustainable and has all the benefits of fish oil without the risks,' says Michael Greger, MD. 'Even fish oil distillation is inadequate in eliminating toxins.'"

Ron