Views: 0 Author: Site Editor Publish Time: 2022-06-01 Origin: Site
Preservative Misconception
China's National Standard GB 2760-2024 explicitly prohibits adding preservatives to canned foods. Preservation is achieved through hermetic sealing and high-temperature sterilization, making preservatives unnecessary.
Nutritional Value Comparison
Vegetable/Fruit Cans: Minerals (potassium, calcium, magnesium) and dietary fiber remain intact. Vacuum sealing reduces nutrient loss. Some nutrients (e.g., lycopene in tomato cans) have higher bioavailability than fresh produce.
Meat Cans: High-temperature processing degrades some B vitamins, but protein and unsaturated fatty acids are well preserved1.
Conclusion: Canned foods are not "junk food" but convenient nutritional sources.
Metal Cans: Choose rust-free, undented cans with concave lids/bottoms (intact seal). Avoid bulging, deformed, or leaking cans.
Glass Jars: Opt for intact contents with clear liquid and slightly concave lids.
Soft Packaging: Select undamaged, unswollen pouches.
Ingredients List:
Prioritize simple compositions with minimal additives (e.g., avoid carrageenan/xanthan gum).
Meat cans should specify meat sources (e.g., "chicken" not "meat by-products").
Nutrition Facts:
Low sodium (≤600mg/100g), low sugar (choose fruit cans in juice/water, not syrup), low fat.
Protein content: Meat cans should contain ≥9% crude protein.
| Type | Recommended Choices | Health Tips |
|---|---|---|
| Vegetable Cans | Tomatoes, corn, peas (high fiber retention) | Drain syrup/liquid to reduce sugar |
| Meat Cans | Tuna/salmon in water/olive oil (quality protein) | Avoid refined seed oils |
| Fruit Cans | Peaches, mandarins (vitamin C-fortified) | Limit intake; use as dessert substitutes |
Storage & Consumption
Refrigerate after opening and consume within 24 hours.
Store unopened cans in cool, dry places to prevent rusting.
Spoilage Identification
Discard immediately if bulging, leaking, discolored (e.g., blackened), or odorous.
Absence of "hiss" when opening indicates possible leakage.
Moisture Content: ≤80% offers better value (every 5% moisture increase reduces dry matter by 25%).
Meat Sources: Clearly labeled species/cuts (avoid vague terms like "meat derivatives").
Nutritional Values:
Cat cans: Crude protein ≥30%; Fat ≤5% (weight control) or ≥8% (kittens).
Dog cans: Crude protein ≥9%; Fat adjusted for size/breed (≤5% for weight loss).
In summary, canned foods are technologically mature convenience products. Prioritize brands with intact packaging, transparent labeling, and recent production dates to ensure safety and nutrition.