Supermarkets often apply discount programs or promotions such as "buy 1 get 1 free" for dairy products. However, you should be cautious when buying in bulk, as discounted milk is often close to its expiration date. If you're sure you'll use it up in a short period, buying a moderate amount is reasonable. On the other hand, buying too much can lead to waste and financial loss.

Supermarkets often apply discount programs or promotions such as "buy 1 get 1 free" for dairy products.

Off-season produce can be purchased year-round, but it’s usually more expensive compared to when it’s in season. Using out-of-season foods requires smart planning to ensure you have delicious, cost-effective, and healthy meals for your family.

3. Ground Meat
   Pre-ground meat is convenient and easy to prepare, but you need to be cautious as its origin and freshness are unclear. Ground meat is often made from scraps, fat, or older meat. When buying, make sure to check carefully to ensure safety and quality.

Ground meat is convenient and easy to prepare, but you need to be cautious as its origin and freshness are unclear.

4. Pre-cut Fruit
   Pre-cut fruit in supermarkets is attractive and convenient, but its quality is not always guaranteed. These are often leftover parts of fruit that have been damaged or are showing signs of decay, with only the usable parts left. The processing can reduce the freshness and flavor compared to buying whole fruit.

5. Discounted Frozen Seafood
   Seafood is always tempting, especially when on sale, but be aware that discounted frozen seafood has often been stored for a long time, which reduces the quality of the meat and poses potential food safety risks. Learn how to choose frozen seafood safely to ensure quality.

6. Pre-cooked Foods
   Supermarkets sell many cold dishes like pickled foods, vegetables, salads, or pre-prepared dishes like bitter melon soup stuffed with meat, pig’s feet, etc. These foods may have ingredients that aren’t fresh and could be prone to bacterial contamination. Harmful bacteria like E. Coli, Salmonella, or Norovirus can survive if the food is improperly stored or processed. Eating too many of these pre-cooked foods could lead to diarrhea, food poisoning, and even long-term health issues.

7. Pre-prepared Vegetables
   Some vegetables are pre-prepared and placed in boxes to 'tempt' shoppers. After being prepared, they look clean and convenient. However, these products are often partially spoiled and could not be sold as-is, which is why supermarket staff prepares them in advance to attract buyers.

8. Make Your Own Sauce Instead
   Sauces like marinade for grilled meat or salad dressing are very convenient, but they may contain many preservatives and harmful chemicals. You can make your own sauces at home to save money, ensure safety, and enjoy the natural flavors.