
Introduction
Tuna is a familiar everyday food, but it becomes much easier to use well when you understand its calories and nutrient profile. This guide summarizes tuna nutrition per 100 g, key vitamins and minerals, practical health benefits, and simple eating tips for different goals.
π Tuna Nutrition Facts
Per 100 g
| Nutrient | Amount |
|---|---|
| π₯ Calories | 132 kcal |
| π Carbohydrates | 0g |
| π₯© Protein | 29.9g |
| π§ Fat | 0.6g |
| π¬ Sugar | 0g |
| πΎ Fiber | 0g |
| π§ Sodium | 37mg |
| π©Έ Cholesterol | 43mg |
Per 100 g, tuna provides 132 kcal, with 0g carbohydrates, 29.9g protein, 0.6g fat, and 0g fiber. The numbers are useful, but the real value comes from how it fits into a complete plate. Pair it with protein, fiber-rich sides, or healthy fats depending on your goal, and adjust portions based on your total daily intake.

π₯ Key Vitamins
| Nutrient | Amount | Daily Value | Main Role |
|---|---|---|---|
| λΉνλ―Ό D | 1.7ΞΌg | 11% | Contributes to everyday metabolism and a balanced nutrient intake. |
| Thiamin | 2.1ΞΌg | 88% | Contributes to everyday metabolism and a balanced nutrient intake. |
| Niacin | 18.8mg | 118% | Contributes to everyday metabolism and a balanced nutrient intake. |
| Vitamin B6 | 0.9mg | 53% | Supports protein metabolism, neurotransmitter production, and energy balance. |
π Essential Minerals
| Nutrient | Amount | Daily Value | Main Role |
|---|---|---|---|
| Selenium | 90ΞΌg | 164% | Supports antioxidant enzymes and normal thyroid hormone metabolism. |
| Phosphorus | 250mg | 36% | Contributes to bones, teeth, cell membranes, and energy production. |
| Potassium | 441mg | 13% | Helps fluid balance, muscle function, and healthy blood pressure patterns. |
| Magnesium | 35mg | 8% | Supports muscle relaxation, energy metabolism, and many enzyme reactions. |
βοΈ Tuna Calorie Comparison
Tuna provides 132 kcal per 100 g. Calories are only one part of the picture: protein, fiber, water content, and cooking method all change how satisfying a serving feels.
π Health Benefits of Tuna

1. Fits a Heart-Friendly Diet
Tuna can support heart-conscious eating when it replaces more processed, salty, or sugary choices. Keep seasonings balanced and pair it with colorful plant foods for potassium, fiber, and antioxidants.
Key nutrients: λΉνλ―Ό D, Thiamin, Selenium, Phosphorus
2. Supports Muscle Maintenance
Tuna can help anchor meals with useful protein and supporting micronutrients. It is especially practical when you want a filling plate that supports recovery, strength, and steady daily energy.
Key nutrients: λΉνλ―Ό D, Thiamin, Selenium, Phosphorus
3. Supports Everyday Metabolism
Tuna contributes nutrients involved in energy use, cell maintenance, and normal body function. It is most helpful when your overall diet includes enough vegetables, grains, protein, and healthy fats.
Key nutrients: λΉνλ―Ό D, Thiamin, Selenium, Phosphorus
4. Easy to Use in Balanced Meals
Tuna is easy to fit into everyday meals without complicated cooking. The simplest approach is to keep portions realistic and build the rest of the plate with vegetables, protein, whole grains, or healthy fats.
Key nutrients: λΉνλ―Ό D, Thiamin, Selenium, Phosphorus

π― How to Eat Tuna for Your Goals
Weight Loss
| Item | Guide |
|---|---|
| Suggested portion | Use the 100 g value of 132 kcal to fit tuna into your meal target. |
| Best timing | Lunch, dinner, or a planned snack time |
For weight loss, tuna works best when it replaces higher-calorie snacks or highly processed foods. Pair it with vegetables and enough protein so the meal stays satisfying.
Muscle Building
| Item | Guide |
|---|---|
| Suggested portion | Check the protein value (29.9g) and carbohydrate value (0g) and adjust for training volume. |
| Best timing | Pre-workout meals, post-workout meals, or protein-focused main meals |
For muscle gain, use tuna as part of a full plate with protein, carbohydrates, and colorful produce. Consistency matters more than forcing a large serving at once.
General Health
| Item | Guide |
|---|---|
| Suggested portion | Choose a realistic serving that you can repeat comfortably. |
| Best timing | Any meal where you want better nutrition density |
For everyday health, rotate tuna with other foods in the same group so your diet gets a wider range of nutrients.
π¬ Tuna Composition, Selection, and Storage
| Component | Why it matters |
|---|---|
| Water and core nutrients | They shape the texture, fullness, and calorie density of tuna. |
| Vitamins and minerals | They help support everyday metabolism, energy use, and general wellness. |
| Natural food compounds | Color, aroma, and flavor compounds make meals more satisfying and varied. |
How to Choose
Choose products with natural color, a fresh aroma, and minimal damage or discoloration. For packaged items, check added sodium, sugar, oils, and ingredient quality.
Storage Tips
Keep fresh foods sealed and refrigerated when needed. Store dry foods and oils in a cool, dark place, and use opened products before their flavor or color noticeably changes.
Final Thoughts
Tuna can be a simple, useful part of a balanced diet when the portion and pairing fit your goal. Use the nutrition numbers as a guide, then adjust based on your appetite, activity level, and the rest of your plate.
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Snap a photo to check calories and nutrition instantly, then keep your meal log in one place.
