Optimum Nutrition Whey vs Spinach
Side-by-side macro comparison. Optimum Nutrition Whey vs Spinach per their standard serving sizes.
Optimum Nutrition Whey
per 1 scoop
Macro Comparison Table
| Macro | Optimum Nutrition Whey | Spinach | Difference |
|---|---|---|---|
| Calories | 120 cal | 7 cal | +1614% Optimum |
| Protein | 24g | 0.9g | +2567% Optimum |
| Carbs | 3g | 1.1g | +173% Optimum |
| Fat | 1g | 0.1g | +900% 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. Spinach delivers 7 calories with 0.9g protein, 1.1g carbs, and 0.1g fat. The most meaningful difference: Spinach saves 113 calories per serving — meaningful over a week of meals. For protein density per calorie, Optimum Nutrition Whey wins at 80% of calories from protein.
When to Pick Each
For Cutting / Weight Loss
When cutting on a tight calorie budget, Spinach gives you 113 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), Optimum Nutrition Whey 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. Optimum Nutrition Whey delivers 24g 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 Spinach are keto-friendly with under 10g carbs per serving.
Frequently Asked
Which has more protein, Optimum Nutrition Whey or Spinach?
Optimum Nutrition Whey has more protein: 24g vs 0.9g per serving. That's a difference of 23.1g.
Which has fewer calories, Optimum Nutrition Whey or Spinach?
Spinach has 7 calories per serving vs 120 calories in Optimum Nutrition Whey — a difference of 113 calories.
Is Optimum Nutrition Whey or Spinach better for keto?
Spinach is the better keto choice at 1.1g carbs per serving vs 3g carbs in Optimum Nutrition Whey.
Is Optimum Nutrition Whey or Spinach better for weight loss?
For weight loss, Spinach gives you more calorie flexibility (113 cal less per serving). For preserving muscle during a deficit, Optimum Nutrition Whey delivers more protein per calorie. Most people on cuts benefit from Optimum Nutrition Whey.
Which Is Better for Your Goal?
🔥 Weight Loss
Optimum Nutrition Whey
Higher protein-to-calorie density + lower absolute fat = more satiety per calorie.
💪 Muscle Gain
Optimum Nutrition Whey
Higher absolute protein per serving better supports muscle protein synthesis.
🥑 Low-Carb / Keto
Spinach
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 Spinach stack up:
Full Optimum Nutrition Whey guide • Full Spinach guide • All comparisons