Is soy sauce healthy or unhealthy?

December 15, 2025

Table of Content

As a beloved condiment in global cuisine, soy sauce is an indispensable kitchen staple in China, Asia, and even worldwide. However, many people wonder: is it truly healthy? The answer doesn’t depend on the soy sauce itself, but is closely related to its production process, ingredients, and sodium content. In recent years, with consumers’ increasing focus on clean eating, zero-additive soy sauces have received widespread praise, such as the zero-additive series from Qianhe.

Is soy sauce healthy or unhealthy? Several factors influence the answer.

Soy sauce is neither a natural nor a harmful condiment, but its effects on the human body depend on three key factors: the fermentation method, the quality of the ingredients, and the sodium content level.

When is soy sauce beneficial to health?

Product Selection Criteria: Prioritize high-salt diluted soy sauce products labeled “brewed soy sauce.” The label must clearly state “brewed soy sauce” and comply with the national food safety standard GB 2717-2018 (Soy Sauce). Preference should be given to soy sauce labeled “high-salt diluted fermentation” (fermentation cycle ≥ 3 months, low-temperature slow-cooking process), which offers a richer flavor and higher amino acid content; avoid products labeled “low-salt solid-state fermentation” (shorter fermentation cycle, slightly inferior quality)
Low Calories and Low Fat:A 15ml serving of healthy soy sauce contains only 10-15 calories and 0 grams of fat, making it a better choice than high-fat sauces (such as mayonnaise) or sugary condiments (such as ketchup).
Zero Additives Means Less Risk:Zero-additive soy sauce does not contain artificial preservatives (sodium benzoate), sweeteners (sucralose), or colorings (caramel color). These additives may disrupt gut microbiota, increase metabolic burden, or introduce potential contaminants (such as 4-methylimidazole in some caramel colors). For more information on zero additives, you can refer to the advocate of zero-additive soy sauce – Qianhe Zero Additive Soy Sauce.

Under what circumstances does soy sauce become unhealthy?

Excessive sodium intake: Regular soy sauce contains 900-1200 milligrams of sodium per 15 milliliters, which is nearly half of the World Health Organization’s (WHO) recommended daily sodium intake (2300 milligrams). Long-term excessive intake can lead to high blood pressure and increase the risk of heart disease and kidney damage.
Chemical production (non-fermentation method): Many inexpensive soy sauces use “hydrolyzed vegetable protein” instead of the traditional fermentation process. These products lack probiotics and antioxidants and often rely on additives to mimic the flavor.
Hidden additives:Even some “premium” soy sauces contain sugar (adding empty calories), MSG (monosodium glutamate), or thickeners (hydroxypropyl distarch phosphate). These substances offer no nutritional benefits and may be harmful to sensitive individuals (e.g., diabetics consuming sugar). Caution is needed regarding the use of these additives.

What is healthy soy sauce?

To answer “Is soy sauce healthy?” you first need to know what qualifies as “healthy soy sauce.” The best options—including zero-additive soy sauce—meet strict criteria across four areas:

1. Fermentation Process: Prioritize "Brewed" and "High-Salt Dilute-State"

Healthy soy sauce is always naturally fermented (not chemically hydrolyzed) and follows the national standard (e.g., China’s GB 2717-2018). For top quality:

Choose “high-salt dilute-state fermentation”: This low-temperature, 4–6 month process preserves nutrients and creates a rich, mellow flavor. Avoid “low-salt solid-state fermentation” (shorter time, higher temperature, lower quality).
Look for labels like “traditional brewed” or “naturally fermented”—these confirm no chemical shortcuts.

2. Ingredients: Zero Additives and Pure Raw Materials

The hallmark of zero-additive soy sauce (a subset of healthy soy sauce) is a short, clean ingredient list. Ideal ingredients include only:

Drinking water
Non-GMO soybeans (or soy)
Wheat (or gluten-free alternatives like tamari for celiac sufferers)
Edible salt (no extra sodium sources)

Avoid soy sauces with preservatives, artificial sweeteners, colorants, or thickeners—these add unnecessary health risks.

3. Nutritional Indicators: Amino Acid Nitrogen and Low Sodium

Two key numbers define a healthy soy sauce:

Amino acid nitrogen ≥ 0.8g/100mL: This is the gold standard for “premium” soy sauce. It measures natural umami and nutrient density—higher levels mean more protein breakdown and better flavor. Aim for “super grade” (≥0.8g/100mL) or “first grade” (≥0.7g/100mL).
Sodium ≤ 500mg/10mL: Opt for “low-sodium” or “reduced-sodium” healthy soy sauce. This cuts sodium intake by 30–40% vs. regular versions, protecting heart health without losing taste.

4. Safety: No Contaminants or Harmful Substances

Healthy soy sauce from reputable brands undergoes strict testing to avoid:

Aflatoxin B1 (from moldy soybeans, linked to liver cancer)
Heavy metals (cadmium, arsenic)
Chloropropanols (from chemical hydrolysis)

Always choose products with clear safety certifications and brand transparency.

How to Choose Healthy Soy Sauce

Now that you know what makes a soy sauce healthy, let’s break down how to choose healthy soy sauce—whether you’re shopping in stores or online. Follow these steps to avoid low-quality products and pick the best zero-additive or healthy soy sauce.

Step 1: Check the Label for "Brewed Soy Sauce" and Standards

First, confirm it says “naturally brewed soy sauce” (not “formulated” or “hydrolyzed”).
Look for the national standard code (e.g., GB 2717-2018 in China, JAS in Japan) to ensure compliance with safety rules.
Prioritize “high-salt dilute-state fermentation”—this is often listed under “production method.”

Step 2: Analyze the Ingredient List for Zero Additives

Count the ingredients: Healthy soy sauce should have 4–5 items max (water, non-GMO soybeans, wheat, salt, and sometimes natural sugar).
Avoid these additives: Sodium benzoate (preservative), sucralose (sweetener), caramel color (colorant), and monosodium glutamate (MSG).
For “zero-additive soy sauce,” the label should explicitly state “no artificial additives” or “zero preservatives.”

Step 3: Compare Amino Acid Nitrogen and Sodium Levels

Flip to the “nutritional information” panel:
- Amino acid nitrogen: Choose ≥0.8g/100mL (super grade) for the most nutrients.
- Sodium: Select ≤500mg/10mL (low-sodium) to control intake. If no low-sodium option exists, pick the lowest sodium level among “super grade” products.

Step 4: Verify Brand Reputation and Sensory Quality

Choose trusted brands: Opt for well-known manufacturers specializing in traditional brewing (e.g., QIANHE Zero-Additivesoy sauce). Avoid unknown “bulk” soy sauces—they may lack safety testing.
Check sensory cues (if possible):
- Color: Rich reddish-brown, clear (no cloudiness or sediment).
- Smell: Strong, mellow soy aroma (no sour, musty, or chemical odors).
- Taste: Balanced salty-savory, with a clean finish (no bitterness).

Step 5: Adapt to Special Dietary Needs

Gluten-free: Pick “qianhe some soy sauce” (made with soybeans instead of wheat) or labeled “gluten-free” healthy soy sauce
Sugar-free: Avoid soy sauces with “white sugar” or “glucose syrup” in the ingredients.

Kids/elders: Prioritize low-sodium + zero-additive options to reduce kidney and heart

Conclusion: Is Soy Sauce Healthy? It Depends on Your Choice

Soy sauce can be either healthy or unhealthy—the power lies in your selection. By choosing zero-additive soy sauce or “healthy soy sauce” (naturally brewed, high amino acid nitrogen, low sodium, and no artificial ingredients), you can enjoy its umami flavor while reaping fermentation benefits. Avoid chemically produced, high-sodium, or additive-laden versions that harm long-term health.

Remember the key rule for “how to choose healthy soy sauce”: Check the label first—fermentation method, ingredients, and nutritional numbers never lie.