Cratox AI
Reviewed by Cratox Nutrition Team · Updated August 13, 2026

Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) vs Vitasoy USA, Organic Nasoya Firm Tofu: nutrition compared

Nutrient (per 100 g)Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari)Vitasoy USA, Organic Nasoya Firm Tofu
Calories78 kcal84 kcal
Protein9 g8.9 g
Carbohydrates2.9 g2.3 g
Fat4.2 g4.4 g
Fibre0.9 g0.8 g
Sugar0.6 g0.3 g
Sodium12 mg4 mg

All values per 100 g. Source: USDA FoodData Central.

Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) - nutritional information
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Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari)

🔥 78 Calories
💪 9g Protein
2.9g Carbohydrates
🥑 4.2g Fat

Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) provides 78 kcal per 100 g, with 9 g of protein, 2.9 g of carbohydrates and 4.2 g of fat. 0.5 cups of Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) (126 g) provides about 98 kcal.

At a glance

A fast summary built from the current nutrition profile per 100g.

Category
Miscellaneous
Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari)
Energy density
Moderate
78 kcal per 100g
Macro energy profile
Balanced
42% Protein · 14% Carbohydrates · 44% Fat
Glycemic profile
Low GI
GI 15 · GL 0.87
Notable signals
Low in sugarLow in sodiumUSDA data

Nutritional Information

78
kcal/100g
Protein
9g
Carbohydrates
2.9g
Fat
4.2g
Glycemic Index:
15

Nutritional Information (per 100g)

NutrientAmount per 100 g
Calories78 kcal
Protein9 g
Carbohydrates2.9 g
Fat4.2 g
Fiber0.9 g
Sugar0.6 g
Sodium12 mg

USDA data · USDA FoodData Central

Calories per portion

PortionWeightCalories
0.5 cups126 g98 kcal
0.25 block81 g63 kcal
100 g100 g78 kcal

Portion weights: USDA FoodData Central

Portion calculator

Calories
78 kcal
Protein
9 g
Carbohydrates
2.9 g
Fat
4.2 g
Fiber
0.9 g
Sugar
0.6 g
Sodium
12 mg

All values are computed from the per-100 g nutrition data (source: USDA).

About Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari)

Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari), is a versatile soy product originating from East Asia. It is made by coagulating soy milk, resulting in a protein-rich food that has become a staple in vegetarian and vegan diets worldwide. The use of calcium sulfate and magnesium chloride not only aids in the coagulation process but also enhances the nutritional profile of the tofu, making it a valuable source of essential minerals such as calcium and magnesium. Tofu can be enjoyed in various dishes, ranging from stir-fries to soups, and is often marinated or grilled to enhance its flavor. Nutritionally, firm tofu is low in carbohydrates and a good source of protein, containing about 9 grams of protein per 100 grams. It is also a source of healthy fats, primarily unsaturated fats, which are beneficial for heart health. Additionally, it is rich in micronutrients like iron and calcium, making it an excellent dietary choice, especially for those following plant-based diets. Its unique texture allows it to absorb flavors well, making it a popular ingredient in a variety of cuisines.

Health Benefits

Supports muscle growth and repair due to high protein content.
Rich in calcium, promoting bone health.
Contains isoflavones that may reduce the risk of certain cancers.
May help lower cholesterol levels and improve heart health.
Aids in weight management due to low calories and high protein.
Supports hormonal balance, particularly in menopausal women.
Offers antioxidant properties which help combat oxidative stress.
Can improve digestive health due to fiber content.
Low glycemic index food, beneficial for blood sugar control.
Provides essential amino acids necessary for various bodily functions.

Recommended Food Pairings

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Tofu and broccoli - a nutrient-dense combination rich in vitamins and minerals.
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Tofu and quinoa - a complete protein source that balances amino acids.
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Tofu and bell peppers - adds vibrant color and vitamin C.
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Tofu and soy sauce - enhances flavor while keeping it plant-based.
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Tofu and sesame oil - adds healthy fats and a rich, nutty flavor.

How to Consume

Serving size
150g (about 1 cup)
Frequency
2-3 times per week
  • Marinate before grilling for enhanced flavor.
  • Use in stir-fries with plenty of vegetables.
  • Blend into smoothies for added protein.
  • Include in soups for a hearty texture.
  • Bake or sauté with spices for a crispy texture.

Selection & Storage

How to choose:

  • Select firm tofu that is free from blemishes and has a smooth texture.
  • Check the expiration date to ensure freshness.
  • Choose tofu that is packed in water for better quality.
  • Look for organic options to avoid pesticides and GMO soy.
Storage
Store in the refrigerator at 1-4°C (34-39°F) in its original packaging or submerged in water.
Shelf life
5-7 days refrigerated, 3 months frozen.

Warnings & Contraindications

  • ⚠️Individuals with soy allergies should avoid tofu.
  • ⚠️Those with thyroid issues may need to limit soy intake due to goitrogens.
  • ⚠️Excessive consumption may lead to digestive issues.
  • ⚠️High protein intake needs to be balanced with other nutrients.

Frequently Asked Questions

How many calories does Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) have?

Firm tofu contains approximately 78 calories per 100 grams, making it a low-calorie option rich in protein and nutrients.

Is Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) healthy?

Yes, firm tofu is considered a healthy food choice due to its high protein content, essential minerals, and low levels of saturated fat. It supports various health benefits, including heart health and weight management.

How should Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) be stored?

Tofu should be stored in the refrigerator in its original packaging or submerged in water to keep it fresh. It can last for 5-7 days in the fridge and can be frozen for up to 3 months.

What are the benefits of eating Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari)?

Eating firm tofu offers numerous benefits, including high protein content for muscle repair, a rich source of calcium for bone health, and isoflavones that may help reduce the risk of certain cancers.

How much Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) can I eat per day?

A recommended daily intake is about 150 grams, which can provide a good balance of protein and essential vitamins without excessive calorie intake.

How many calories are in 0.5 cups of Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) (126 g)?

0.5 cups of Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) (126 g) has about 98 kcal — 11.3 g protein, 3.7 g carbohydrates and 5.3 g fat (calculated from the USDA values per 100 g).

How many calories are in 0.25 block of Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) (81 g)?

0.25 block of Tofu, firm, prepared with calcium sulfate and magnesium chloride (nigari) (81 g) has about 63 kcal — 7.3 g protein, 2.3 g carbohydrates and 3.4 g fat (calculated from the USDA values per 100 g).

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