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Yellowfin tuna is mostly sold as blocks or tuna saku loins, which is why this fish is also called saku tuna. Saku means “block” in Japanese. The uniform shape makes it easy to cut the fish for preparing sushi or a salad. Tuna saku loins are skinless, boneless, and have a firm texture and a mild flavor, which make them very versatile and suitable for different preparations.

Ahi Tuna Nutrition

Yellowfin tuna is a nutrient-dense food packed with essential vitamins and minerals. Here are some key nutritional details for an 8 oz serving of ahi tuna:

• Calories: 240 calories
• Protein: 50 grams – High in protein, making it an excellent choice for muscle building and maintenance.
• Fat: 2.5 grams – Low in fat, yet high in healthy Omega-3 fatty acids (about 1 gram).
• Vitamins: Rich in vitamins B6 and B12, which are crucial for energy production and brain health.
• Minerals: Contains essential minerals such as selenium, phosphorus, and magnesium.
• Carbohydrates: 0 grams – Ahi tuna is carbohydrate-free.

Due to its nutrient content, yellowfin tuna supports heart health, brain function, and overall well-being. However, like all large fish, it may contain mercury, so it should be consumed in moderation. Infants, young children, and pregnant women may choose to avoid having ahi tuna because of its high mercury content.