Product details, positive and negative aspects, and ingredients or materials are important factors to consider when purchasing or using a product. Here are some relevant information from the search results:

• Positive and negative aspects: When evaluating a product, it is important to consider both its positive and negative aspects. For example, the Think Dirty app rates products based on the potential health impacts of their published ingredients, including documented evidence of carcinogenicity, developmental and reproductive toxicity, and allergenicity and immunotoxicity. On the other hand, "positive hold" for incoming and outgoing materials is not a strict requirement for SQF, a food safety certification, but it can help reduce risk.

• Ingredients or materials: Understanding the ingredients or materials used in a product is crucial for making informed decisions. Food labels, for instance, list ingredients in descending order by weight, with the first ingredient listed being present in the largest amount. Some products may contain compound ingredients, which are made by a mixture of other ingredients. Additionally, some ingredients may be listed by their chemical name or food additive number. The USDA provides guidance on labeling ingredients in meat and poultry products.

• Packaging and labeling: Packaging and labeling can also provide important information about a product. For example, food labels include nutrition and ingredient information, as well as product dates. Nutrient content claims, such as "low sodium" or "high fiber," are regulated by the FDA and must meet specific guidelines. However, some terms, such as "organic," are not regulated. It is important to be aware of terms that indicate added sugar or artificial sweeteners.

In summary, when evaluating a product, it is important to consider its positive and negative aspects, understand the ingredients or materials used, and review the packaging and labeling for relevant information.