Written by CalorieData Nutrition TeamReviewed by a Registered DietitianLast Updated: March 2026

Kombucha vs Oat Milk: Nutrition Comparison

Which is healthier? Compare calories, protein, carbs, and more

Complete side-by-side nutrition comparison per 100g serving | Updated 2026

Which is Healthier?

Kombucha is generally healthier

Kombucha comes out ahead in this comparison, winning in 3 out of 5 key nutritional categories. It has fewer calories (17 vs 47), less sugar (3g vs 3.2g), less sodium (5mg vs 36mg)making it the better choice for most health goals.

Quick Summary

Fewer Calories

Kombucha

17 kcal

More Protein

Oat Milk

1g

More Fiber

Oat Milk

0.8g

Less Sugar

Kombucha

3g

Visual Comparison

Caloriesper 100g
Kombucha
17
Oat Milk
47
Proteinper 100g
Kombucha
0g
Oat Milk
1g
Carbohydratesper 100g
Kombucha
4.5g
Oat Milk
7.8g
Fatper 100g
Kombucha
0g
Oat Milk
1.5g

Side-by-Side Nutrition Table

NutrientKombuchaOat MilkDifference
Calories17kcal47kcal-30.0kcal
Protein0g1g-1.0g
Carbohydrates4.5g7.8g-3.3g
Fat0g1.5g-1.5g
Fiber0g0.8g-0.8g
Sugar3g3.2g-0.2g
Sodium5mg36mg-31.0mg

Serving Size Comparison

All values above are per 100g. Here's how they compare in common serving sizes:

Kombucha

Per 100g:17 calories
Per cup (150g):26 calories
Per serving (85g):14 calories

Oat Milk

Per 100g:47 calories
Per cup (150g):71 calories
Per serving (85g):40 calories

Diet Compatibility

Kombucha

Low-CarbLow-CalorieVeganVegetarianLow-Sodium

Oat Milk

Low-CarbLow-CalorieVeganVegetarianLow-Sodium

When to Choose Kombucha

  • Lower in calories (17 vs 47)
  • Lower in carbs (4.5g vs 7.8g)
  • Less sugar (3g vs 3.2g)
  • Lower sodium (5mg vs 36mg)

Common Uses

HydrationMorning ritualSocial occasionsEnergy boost
View full Kombucha nutrition →

When to Choose Oat Milk

  • Higher in protein (1g vs 0g)
  • More fiber (0.8g vs 0g)

Common Uses

HydrationMorning ritualSocial occasionsEnergy boost
View full Oat Milk nutrition →

Kombucha vs Oat Milk: Nutritional Analysis

Oat Milk is more calorie-dense at 47 calories per 100g compared to 17 for Kombucha, a difference of 30 calories. On the protein front, Oat Milk delivers more with 1g per 100g versus 0g, which matters for muscle maintenance, satiety, and overall metabolic health. These differences become meaningful when you consider how each food fits into your daily dietary pattern rather than looking at any single nutrient in isolation.

Macronutrient Breakdown

The macronutrient profiles of Kombucha and Oat Milk tell different nutritional stories. Kombucha provides 4.5g of carbohydrates, 0g of fat, and 0g of fiber per 100g, while Oat Milk contains 7.8g carbs, 1.5g fat, and 0.8g fiber. The higher fiber content in Oat Milk supports digestive health, helps regulate blood sugar after meals, and contributes to longer-lasting satiety. Sugar content also differs: Kombucha contains 3g while Oat Milk has 3.2g per 100g. Lower sugar options are generally preferable for blood sugar management and dental health.

Key Takeaways

  • For weight management: Kombucha is the lower-calorie choice at 17 cal/100g, making it more suitable for calorie-controlled diets.
  • For muscle building: Oat Milk provides more protein (1g/100g), supporting muscle repair and growth.
  • For sustained energy: Oat Milk offers more fiber (0.8g/100g), which slows digestion and provides steadier energy release.
  • Overall: Neither food is universally "better" than the other. The right choice depends on your specific nutritional goals, meal context, and dietary preferences. Both can play a role in a balanced diet.

Frequently Asked Questions

Which has more calories, Kombucha or Oat Milk?

Oat Milk has more calories with 47 kcal per 100g, compared to Kombucha with 17 kcal. That's a difference of 30 calories per 100g serving.

Is Kombucha healthier than Oat Milk?

Based on our nutritional analysis, Kombucha is generally the healthier choice, winning in 3 out of 5 key nutritional categories. Kombucha has 17 calories, 0g protein, and 0g fiber per 100g. However, the best choice depends on your specific dietary goals.

What is the protein difference between Kombucha and Oat Milk?

Oat Milk has more protein with 1g per 100g, compared to Kombucha with 0g. Oat Milk provides 1.0g more protein per 100g serving.

Which is better for weight loss, Kombucha or Oat Milk?

For weight loss, Kombucha is the better choice with only 17 calories per 100g compared to 47 calories in Oat Milk. Oat Milk also offers 0.8g of fiber per 100g, which helps you feel fuller longer.

Does Kombucha or Oat Milk have fewer carbs?

Kombucha has fewer carbs with 4.5g per 100g, compared to Oat Milk with 7.8g. If you're following a low-carb diet, Kombucha is the better option with 3.3g fewer carbohydrates.

About Our Data

All nutrition data in this comparison is sourced from the USDA FoodData Central, the official food composition database maintained by the U.S. Department of Agriculture. Values are based on 100g servings for accurate comparison.

Health Disclaimer: This comparison is for informational purposes only and is not intended as medical or dietary advice. Nutritional needs vary by individual. The best food choice depends on your personal health goals, dietary requirements, and preferences. Consult a healthcare provider or registered dietitian for personalized nutrition guidance.