Early version. Nutrient values from USDA FoodData Central; dietitian review in progress. Not medical advice.

How healthy is dark chocolate?

Is dark chocolate healthy? It can fit a healthy diet in small amounts. Dark chocolate scores 14/100 on the HowHealthyIs Score: 100 g provides 598 kcal, 12 mg iron and 228 mg magnesium. Dark chocolate with 70% cocoa or more brings iron, magnesium and fiber, but it is high in saturated fat and added sugar, so a couple of squares is a typical portion. Source: USDA FoodData Central.

  • High in fiber
  • High in iron
  • High in saturated fat
Score explained

The score compares nutrient density per 100 kcal across every food we cover (NRF9.3 method). Dark chocolate ranks higher than 14% of them.

Counts in favor (% daily value per 100 kcal)

  • Iron11%
  • Magnesium9%
  • Fiber7%
  • Protein3%
  • Potassium3%
  • Calcium1%
  • Vitamin E1%
  • Vitamin A0%
  • Vitamin C0%

Counts against

  • Saturated fat20%
  • Added sugars8%
  • Sodium0%

Raw NRF9.3: 33 minus 29 = 5. The score is not a verdict on whether to eat a food; portion, the whole meal and your own health matter more. Full methodology

How many calories are in dark chocolate?

Calories120kcal
Protein1.6g
Carbohydrates9.2g
Fat8.5g
Fiber2.2g
Sugars4.8g
Nutrition facts for dark chocolate. Per 100 g and for the selected portion (20 g). %DV uses FDA Daily Values.
NutrientPer 100 gPer portion%DV
Energy and macronutrients
Calories598 kcal120 kcal
Protein7.8 g1.6 g3%
Carbohydrates46 g9.2 g3%
Fiber11 g2.2 g8%
Sugars24 g4.8 g
Added sugars24 g4.8 g10%
Fat43 g8.5 g11%
Saturated fat24 g4.9 g24%
Vitamins
Vitamin A2 µg0.4 µg0%
Vitamin C0 mg0 mg0%
Vitamin E0.6 mg0.1 mg1%
Minerals
Calcium73 mg15 mg1%
Iron12 mg2.4 mg13%
Potassium715 mg143 mg3%
Magnesium228 mg46 mg11%
Sodium20 mg4 mg0%

Source: USDA FoodData Central, "Chocolate, dark, 70-85% cacao solids" (FDC 170273). Values rounded.

Why is dark chocolate good for you?

  • 2.4 mg iron in 2 squares, 13% of the daily value. Iron contributes to the normal formation of red blood cells.
  • 46 mg magnesium in 2 squares, 11% of the daily value. Magnesium contributes to normal muscle function.

Good ways to use it

  • A satisfying treat in small portions
  • Choosing it over milk chocolate when you want chocolate

What should you watch out for?

  • High in saturated fat and added sugar.
  • Contains caffeine and theobromine.

What can you eat instead of dark chocolate?

Foods you can use the same way with a higher HowHealthyIs Score.

How does dark chocolate compare?

Common questions about dark chocolate

How many calories are in dark chocolate?
100 g of dark chocolate has 598 kcal. A typical portion, 2 squares (20 g), has about 120 kcal.
How much protein is in dark chocolate?
Dark chocolate has 7.8 g of protein per 100 g, or about 1.6 g in 2 squares.
Is dark chocolate good for weight loss?
Dark chocolate is fairly calorie-dense (598 kcal per 100 g), so portion size matters more than the food itself. 2 squares is about 120 kcal.

Sources

  1. U.S. Department of Agriculture. FoodData Central, SR Legacy: "Chocolate, dark, 70-85% cacao solids", FDC ID 170273. fdc.nal.usda.gov
  2. U.S. Food and Drug Administration. Daily Value on the Nutrition and Supplement Facts Labels (21 CFR 101.9).
  3. Fulgoni VL, Keast DR, Drewnowski A. Development and validation of the Nutrient-Rich Foods Index. J Nutr. 2009;139(8):1549-1554.
  4. Monteiro CA, et al. Ultra-processed foods: what they are and how to identify them. Public Health Nutr. 2019;22(5):936-941.

Review and updates

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More: Oils, sweets & spreads ranked, foods high in iron.