Let it be known :::grin::: that my cousin (an RN) and myself spent almost 2 weeks in 'deep research' trying to find THE purest, most natural, most effective fish oil available. What we found (in a very small nutshell):
--all the various process to remove metals/toxins (typically molecular distillation), also removes the naturally occuring vitamins. (I can live with 'no vitamin' fish oil, but it would be wonderful to get the naturally occuring Vitamin A & D).
There are MANY 'name brand' companies that 'cleanse' the oil and claim the vitamins in the oil are naturally occurring, but apparently, that's a lie...and they are adding synthetic vitamin (we found a LOT of 'forum evidence' of people phoning/writing these companies, always to end up with "no reply" or information that was clearly deceptive).
--we did not take into account the various attributes of Omega 3 oils (which can be obtained from sources other than fish) - we were primarily interested in the mental/emotional/brain effects (although she was very interested in the benefits on allergies & asthma, as well).
--"Fish Oil" in any form is NOT part of the protocol of Dr. Schulze
, Dr. Christopher OR Dr. Gerson's therapy. So using it is a 'every man for himself' situation on this forum. I used it to assist coming off anti-depressants (with fantastic results), and so I've never stopped using it consistently. If I go more than 10-14 days without it, I sense a vague return of mental issues...it may be that I need it, it may be that I have other issues (like stress & EMF exposure from the monitor and cordless phones) that make it a necessary band-aid for me at this time. I *personally* believe it pretty-much-a-good-thing when dealing with emotional/mental issues while healing the body. Yet the 'three good doctors' NEVER used it.
What is "optimal" (in my opinion) is really 'out of reach' most people (particularly families) financially...assuming they want a 'therapeutically effective' amount of EPA/DHA (which to me is an *absolute* minimum of 400 EPA and 200 EPA for assisting healing of any brain/mental/emotional issue...many people will see NO results from this minimum, so I always recommend to 'double that' for starters).
For those with the ready cash (and those willing to take enough to get enough EPA/DHA), I recommend the following three (based primarily on the research/information here: http://www.westonaprice.org/basicnutrition/cod-liver-oil-menu.html
combined with the research/info from others, and especially my cousin who is the "oil queen" when it comes to knowledge & research of oils)
* Dr. Ron's Ultra-Pure: Blue Ice High-Vitamin Fermented Cod Liver Oil, 1-877-472-8701, drrons.com
* Radiant Life: Blue Ice High-Vitamin Fermented Cod Liver Oil and Premier High-Vitamin Cod Liver Oil, (888) 593-8333, radiantlifecatalog.com
* Green Pasture Products: Blue Ice High-Vitamin Fermented Cod Liver Oil, (402) 858-4818, greenpasture.org
* Health Alert: Blue Ice High-Vitamin Fermented Cod Liver Oil (831) 372-2103, healthalertstore.com
(For example, of Dr. Ron's, one would need to spend around $50 monthly to get the therapeutic amount of EPA/DHA). I personally cannot afford (two people) $100 monthly for fish oil...nor can most other people I know :(
(click the main link above to find where they are available in countries other than the US)
Here's what Rocky & I currently use:
(although there are small amounts of ingredients that are not 100% natural) I generally take 2 capsules daily (400 EPA/200 DHA)
My cousin (and her husband) use Carlson's Liquid (although it likely has added synthetic vitamins). I cannot even FATHOM trying to swallow liquid fish oil not encapsulized...ack.
And that's what I know about that.
Oodles of healing blessings!