Of all the things that you’re buying, it is very important to read the label. Most importantly you read the expiration date when it’s edible because there are cases wherein the quality assurance team could miss these things. You might end up feeding your family spoiled foods.
Same also when buying medicines, it also very important to check the label and make sure you’re getting the right dose. It is also important to read the contraindications. For example you’ve seen an unfamiliar drug named Tysibri, you can read the label on its indication and search the internet for Tysabri side effects to make yourself knowledgeable enough.