What's the Black Stuff in Tuna?

Examine the core facts What's the Black Stuff in Tuna supported by expert analysis.

Tuna steak from the grocery store should only be consumed raw if it is labeled sushi-grade or sashimi-grade. While this is still not a guarantee against parasites, it means the fish was caught, cleaned, and frozen quickly while still on the boat and is the best option for sushi or sashimi.