Grapefruit vs Orange Juice
Side-by-side macro comparison. Grapefruit vs Orange Juice per their standard serving sizes.
Macro Comparison Table
| Macro | Grapefruit | Orange Juice | Difference |
|---|---|---|---|
| Calories | 52 cal | 112 cal | -54% Grapefruit |
| Protein | 0.9g | 1.7g | -47% Grapefruit |
| Carbs | 13g | 26g | -50% Grapefruit |
| Fat | 0.2g | 0.5g | -60% Grapefruit |
Differences shown relative to Grapefruit. Positive = Grapefruit has more.
Quick Take
Grapefruit delivers 52 calories per serving with 0.9g protein, 13g carbs, and 0.2g fat. Orange Juice delivers 112 calories with 1.7g protein, 26g carbs, and 0.5g fat. The most meaningful difference: Grapefruit saves 60 calories per serving — meaningful over a week of meals. Both deliver similar protein density.
When to Pick Each
For Cutting / Weight Loss
When cutting on a tight calorie budget, Grapefruit gives you 60 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), Grapefruit delivers more grams of protein per calorie consumed.
For Bulking / Muscle Gain
For muscle gain, you want calories AND protein. Orange Juice brings 112 calories — useful when you're chasing a surplus and struggling to eat enough. Orange Juice delivers 1.7g 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
Grapefruit fits cleanly into keto with only 13g carbs. Orange Juice at 26g carbs uses significantly more of your daily 20-30g carb budget.
Frequently Asked
Which has more protein, Grapefruit or Orange Juice?
Orange Juice has more protein: 1.7g vs 0.9g per serving. That's a difference of 0.7999999999999999g.
Which has fewer calories, Grapefruit or Orange Juice?
Grapefruit has 52 calories per serving vs 112 calories in Orange Juice — a difference of 60 calories.
Is Grapefruit or Orange Juice better for keto?
Grapefruit is the better keto choice at 13g carbs per serving vs 26g carbs in Orange Juice.
Is Grapefruit or Orange Juice better for weight loss?
For weight loss, Grapefruit gives you more calorie flexibility (60 cal less per serving). For preserving muscle during a deficit, Grapefruit delivers more protein per calorie. Most people on cuts benefit from Grapefruit.
Which Is Better for Your Goal?
🔥 Weight Loss
Grapefruit
Higher protein-to-calorie density + lower absolute fat = more satiety per calorie.
💪 Muscle Gain
Orange Juice
Higher absolute protein per serving better supports muscle protein synthesis.
🥑 Low-Carb / Keto
Grapefruit
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:
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Other ways Grapefruit and Orange Juice stack up:
Full Grapefruit guide • Full Orange Juice guide • All comparisons