It took some digging, but I identified a source that speaks to how much alcohol is in the fish ester form used in fish oil capsules.
From ConsumerLab:
“A very small amount of ethanol (pure alcohol) is released from the ethyl ester
form into the gut during this process (about 13% of
EPA/DHA ethyl ester is ethanol), although the amount is likely to be insignificant (just a few drops of ethanol per softgel) for most people.”
In a standard fish oil capsule with 0.3 grams of DHA/EPA, that would be:
0.3 X 13% = 0.039 grams of alcohol, in one capsule
One gram of carbohydrate is 4.5 calories meaning the amount of alcohol in calories people get is:
4.5 calories X 0.039 grams = 0.175 calories
There have been studies of fish oil in alcoholics, and it has shown benefit. Of course, they imbibe much more alcohol, outside of “fish alcohol.” To put this in context, this is what is said about the alcohol grams in a can of beer:
“In the United States, one “standard” drink (or one alcoholic drink equivalent) contains roughly 14 grams of pure alcohol, which is found in: 12 ounces of regular beer, which is usually about 5% alcohol.”
https://theinstituteofbeer.com/beer/often-asked-how-many-grams-alcohol-in-beer.html
How much beer would someone have to drink to equal the alcohol in one standard fish oil capsule?
NOTE: 12 ounces of beer = 340.194 grams
0.039 grams of alcohol in capsule / 14 grams of alcohol in 12 ounces of beer = 0.0028 or 0.28% of a 12 ounce can
How many standard fish oil capsules would it take to equal a can of beer, for alcohol content?
14 grams of alcohol in 12 ounces of beer / 0.039 grams of alcohol in a fish capsule = 359 capsules
Calculations performed above are only as good as my currently non-caffeinated brain.
I really don’t think there’s a practical problem with a day’s worth of fish oil, for practically anyone, especially when alcoholics benefit from fish oil capsules.
More:
A New Perspective on Fish Oil: The Prevention of Alcoholic Liver Disease
https://pubmed.ncbi.nlm.nih.gov/34732632/
Fish oil may benefit alcohol abusers
https://www.sciencedaily.com/releases/2014/07/140717180252.htm
https://www.thespectrumeyecentre.com/eye-conditions/omega.html
Conclusion from above
"Natural TG fish oil supplements offer numerous advantages over EE fish oil supplements. First, TG oils are the molecular form found naturally in fish and they are more resistant to oxidation than EE oils. Most importantly, however, is the fact that TG fish oils are metabolized and absorbed more efficiently and completely than EE oils, which may increase overall health benefits for consumers."
The link discusses it better than I can.
Good night!