6. why must customers be more proactive in informing themselves about dietary supplements than drugs

The main reason behind this is that drugs are illegal is most of the places in this world, so there is a chance of getting caught. Secondly dietary supplements are more marketable as the number of consumers are considerably high. Another reason could be by spilling out drug names, you don't want to count yourself under trouble if someone else gets the side effects of it.

Lightning would be your answer