1. Do not buy products with long-term, intensive advertising. Buy from brands that have been established for a long time, with not too much advertising but consistently good word-of-mouth.
2. Do not buy products that are frequently on sale or have price promotions. Brands that constantly engage in price wars cannot guarantee product quality. If the price is reduced because the product is about to expire or is not fresh, its safety and nutritional value have already been compromised, making it not worth buying.
3. Try to buy locally produced products. Local products reduce transportation and storage环节 (links/steps), resulting in slightly lower product costs and better value for the same price.
4. Try to buy the freshest products, preferably those with shorter shelf lives. The longer the shelf life, the more likely nutrient loss is to increase, and the greater the possibility of additives such as preservatives.
5. Try to buy the purest, most natural-form products, and buy fewer products with multiple added ingredients. Pure, natural-form products are more difficult to adulterate, whereas mixed products are much easier. For example, it is more difficult to fake pure milk than it is to fake milk beverages or milk powder.