100788
Cod 's soft liver can be canned or fermented into cod liver oil , providing an excellent source of vitamin A , vitamin D , vitamin E and omega-3 fatty acids ( EPA and DHA ) .
 cod liver oil, vitamin A, vitamin D, vitamin E
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Answer:
 cod liver oil, vitamin A, vitamin D, vitamin E