Optimum Nutrition Whey vs Tuna
Side-by-side macro comparison. Optimum Nutrition Whey vs Tuna per their standard serving sizes.
Optimum Nutrition Whey
per 1 scoop
Macro Comparison Table
| Macro | Optimum Nutrition Whey | Tuna | Difference |
|---|---|---|---|
| Calories | 120 cal | 116 cal | +3% Optimum |
| Protein | 24g | 26g | -8% Optimum |
| Carbs | 3g | 0g | 0% Optimum |
| Fat | 1g | 0.8g | +25% Optimum |
Differences shown relative to Optimum Nutrition Whey. Positive = Optimum Nutrition Whey has more.
Quick Take
Optimum Nutrition Whey delivers 120 calories per serving with 24g protein, 3g carbs, and 1g fat. Tuna delivers 116 calories with 26g protein, 0g carbs, and 0.8g fat. The most meaningful difference: they're within 4 calories per serving, so calorie load is essentially equivalent. Both deliver similar protein density.
When to Pick Each
For Cutting / Weight Loss
When cutting on a tight calorie budget, Tuna gives you 4 more calories of headroom per serving — that's room for an extra snack, more vegetables, or a higher-protein second portion. If protein density matters more (which it does for preserving muscle on a deficit), Tuna delivers more grams of protein per calorie consumed.
For Bulking / Muscle Gain
For muscle gain, you want calories AND protein. Optimum Nutrition Whey brings 120 calories — useful when you're chasing a surplus and struggling to eat enough. Tuna delivers 26g of protein per serving, which directly feeds muscle protein synthesis. The best pick depends on whether you need more total calories or more usable protein.
For Keto / Low-Carb
Both Optimum Nutrition Whey and Tuna are keto-friendly with under 10g carbs per serving.
Frequently Asked
Which has more protein, Optimum Nutrition Whey or Tuna?
Tuna has more protein: 26g vs 24g per serving. That's a difference of 2g.
Which has fewer calories, Optimum Nutrition Whey or Tuna?
Tuna has 116 calories per serving vs 120 calories in Optimum Nutrition Whey — a difference of 4 calories.
Is Optimum Nutrition Whey or Tuna better for keto?
Tuna is the better keto choice at 0g carbs per serving vs 3g carbs in Optimum Nutrition Whey.
Is Optimum Nutrition Whey or Tuna better for weight loss?
For weight loss, Tuna gives you more calorie flexibility (4 cal less per serving). For preserving muscle during a deficit, Tuna delivers more protein per calorie. Most people on cuts benefit from Tuna.
Which Is Better for Your Goal?
🔥 Weight Loss
Tuna
Higher protein-to-calorie density + lower absolute fat = more satiety per calorie.
💪 Muscle Gain
Tuna
Higher absolute protein per serving better supports muscle protein synthesis.
🥑 Low-Carb / Keto
Tuna
Lower carbohydrate content fits keto and low-carb macros without burning your carb budget.
Both fit most balanced diets. These verdicts reflect macro-only comparisons — taste, satiety, cost, and personal preference also matter.
Find Your Personal Macros
The "right" food depends on your individual macro targets. Calculate yours in 60 seconds:
→ Calculate My Macros (Free)Related Comparisons
Other ways Optimum Nutrition Whey and Tuna stack up:
Full Optimum Nutrition Whey guide • Full Tuna guide • All comparisons