Thanks DDye for that concise answer.
It was as much of curiousity as well as small concern about any seafood, plant or animal, sourced just east of Japan, let alone much of the north Pacific in recent times. We all know why.
It must be Chilean jack mackerel they are using, then. Apparently, it's one of the world's most important edible fish. Excellent source of omegas so I regularly eat mackerel. Where I live, they are sourced mostly from the north Atlantic. Although try to, I find it hard to eat anchovies but am glad they are in the Super Omega formula. What's nice about anchovies is that they are lower in the food chain and are herbivores meaning less bio-accumulation.
But insofar as radiation concerns, I don't think it's terribly relevant to fish oil
in any case as apparently the main culprits such as cesium-137 collects in the fish's bone and muscle, not fatty tissue. It would collect in human bone and muscle as well, causing greater risk for certain types of diseases such as leukemia (blood cell cancer). Blood cells are formed in bone marrow.
As far oscar2u's questions, I would add the following to what DDye said.
- Natural antioxidants such as tocopherols, rosemary and lignans, in LEF's Super Omega 3 would help preserve the oil
. I'd rather have them than BHT. Also, the vacuum of the capsule itself would help preservation immensely.
- The expiry date is there for a reason. Among reputable manufacturers, it's an underestimate so you're assured freshness.
- What exactly is fish oil
you ask? Well, for that matter, what is olive oil
, corn oil
, etc. (restricting the scope to just edible oil
s). It's pretty much the same answer. The same kinds of questions you're asking about fish oil
applies to them. One thing to point out is that these common food oil
s are not encapsulated (they come in bottles) and therefore would go rancid far quicker. You sort of get an idea how long then encapsulation extends life of the oil
- This webpage provides a nicely concise explanation of what fish oil
is extracted: How is Fish Oil
- These YouTube videos show the process in motion. Although their intent seems to be marketing, you can extract some technical information out of them: Supercritical CO2 Extraction http://www.youtube.com/watch?v=ulAEfpO67jM
, How a First-Rate Fish Oil
Supplement is Made (encapsulation) http://www.youtube.com/watch?v=VSklbnn2nus
, Fish Oil
- Molecular distillation that LEF's supplier uses (not well explained in those videos above) would effectively make their fish oil
far cleaner than even in pre-industrial times.
- Fish oil
is one animal fat that is good for you. Myself, cholesterol values improved significantly as but one easily measurable effect.
I also try to get plant based oil
s from food including flax and chia which have pre-cursors for the body to synthesize the types of omega 3 fatty acids it needs albeit at low efficiency. That's the DHA and EPA. There is little question that pre-formed omega 3s such as found in fish oil
does a lot of good. The only question then becomes what is the quality of that fish oil
and it seems LEF is doing a pretty good job in that aspect.