Milk vs Soy Milk
Side-by-side macro comparison. Milk vs Soy Milk per their standard serving sizes.
Macro Comparison Table
| Macro | Milk | Soy Milk | Difference |
|---|---|---|---|
| Calories | 149 cal | 100 cal | +49% Milk |
| Protein | 8g | 7g | +14% Milk |
| Carbs | 12g | 8g | +50% Milk |
| Fat | 8g | 4g | +100% Milk |
Differences shown relative to Milk. Positive = Milk has more.
Quick Take
Milk delivers 149 calories per serving with 8g protein, 12g carbs, and 8g fat. Soy Milk delivers 100 calories with 7g protein, 8g carbs, and 4g fat. The most meaningful difference: Soy Milk saves 49 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, Soy Milk gives you 49 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), Soy Milk delivers more grams of protein per calorie consumed.
For Bulking / Muscle Gain
For muscle gain, you want calories AND protein. Milk brings 149 calories — useful when you're chasing a surplus and struggling to eat enough. Milk delivers 8g 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
Soy Milk fits cleanly into keto with only 8g carbs. Milk at 12g carbs uses significantly more of your daily 20g carb budget.
Frequently Asked
Which has more protein, Milk or Soy Milk?
Milk has more protein: 8g vs 7g per serving. That's a difference of 1g.
Which has fewer calories, Milk or Soy Milk?
Soy Milk has 100 calories per serving vs 149 calories in Milk — a difference of 49 calories.
Is Milk or Soy Milk better for keto?
Soy Milk is the better keto choice at 8g carbs per serving vs 12g carbs in Milk.
Is Milk or Soy Milk better for weight loss?
For weight loss, Soy Milk gives you more calorie flexibility (49 cal less per serving). For preserving muscle during a deficit, Soy Milk delivers more protein per calorie. Most people on cuts benefit from Soy Milk.
Which Is Better for Your Goal?
🔥 Weight Loss
Soy Milk
Higher protein-to-calorie density + lower absolute fat = more satiety per calorie.
💪 Muscle Gain
Milk
Higher absolute protein per serving better supports muscle protein synthesis.
🥑 Low-Carb / Keto
Soy Milk
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 Milk and Soy Milk stack up: