The differences in nutrient levels between fresh and frozen are so minor that they would be unlikely to have an impact on overall health.
Les Français mangent de plus en plus d’aliments d’origine animale crus. Des pratiques « potentiellement à risque », selon l’Anses.
Fresh is best – right? In fact, studies on the relative benefits of fresh and frozen show no consistent differences
Four vitamins were analyzed in several fruit and vegetable commodities to evaluate the differences between freshand frozen produce. [...] Overall, the vitamin content of the frozen commodities wascomparable to and occasionally higher than that of their fresh counterparts.
J Agric Food Chem. 2015 Jan 28;63(3):951-6. doi: 10.1021/jf504890k. Epub 2015 Jan 13. Comparative Study
Don’t fancy a worm with your nigiri? Freezing or cooking the fish is the answer