Not sure how this has to do with Health but my answer would be to not buy things online at all. Nowadays it's EXTREMELY easy to get robbed of your money, by people that live across the world. Your bank account can easily be accessed through a phone, computer, gaming system, credit/debit card, check book, etc. I covered things both online and off. Stay safe!
Nutrients are vitamins, minerals, carbohydrates, proteins, fats, water.
Opiates, come from poppy seeds; they are narcotic pain medications used to treat mild to severe pain. Ex of some medications that are opiates, are, morphine, hydrocodone, OxyContin, codeine, etc.