Core Insights - Soy sauce has evolved from a simple seasoning to a diverse product with various types and labels, making selection challenging for consumers [1] Group 1: Key Indicators for Choosing Soy Sauce - Three critical indicators to consider when selecting soy sauce are amino acid nitrogen content, sodium content, and production method [2][3] - Amino acid nitrogen is essential for flavor and quality, with higher levels indicating better taste; the national standard specifies that for every 100 milliliters of soy sauce, grade three should have ≥0.4 grams, grade two ≥0.55 grams, grade one ≥0.7 grams, and special grade ≥0.8 grams [3] - Sodium content is crucial for health, as excessive intake can increase hypertension risk; consumers are advised to choose "low sodium" options and control usage, especially for those with high blood pressure [3] Group 2: Types of Soy Sauce and Their Uses - Different types of soy sauce serve specific culinary purposes: light soy sauce is suitable for cold dishes and enhancing flavor, while dark soy sauce is used for coloring in braised dishes [5][6] - Functional soy sauces, such as "flavor-enhanced" or "mushroom soy sauce," contain added ingredients for specific flavors, while "zero-additive" soy sauces lack preservatives but may not have lower sodium content [6] Group 3: Guidelines for Special Populations - For children, it is essential to control soy sauce intake, with recommendations against consumption for infants under one year; "children's soy sauce" often lacks standardized sodium content [8] - Individuals with hypertension should prioritize low-sodium soy sauce, while those with diabetes should consume soy sauce in moderation and check for added sugars in the ingredient list [8] Group 4: Storage and Common Misconceptions - Proper storage of soy sauce includes keeping unopened bottles in a cool, dark place and refrigerating low-sodium or zero-additive varieties after opening; any signs of spoilage should lead to disposal [10] - A common misconception is that using soy sauce eliminates the need for additional salt in cooking; due to varying salt levels in different soy sauces, careful adjustment is necessary to avoid excessive sodium intake [10] Group 5: Label Insights - Consumers should focus on key information on soy sauce labels and not be misled by marketing terms like "special brew" or "first press"; a simple ingredient list with high-quality core indicators is essential for selecting good soy sauce [11]