arr, to navigate the treacherous waters of nutrition, one must understand the decline of certain foods' popularity due to adverse studies. before we hoist the sails and initiate a discussion on this, a clarification is needed on the term "preexplicative." it relates to explaining something beforehand, aye? now, leveraging this understanding, list all the unknown negative effects of popular dietary supplements that companies try to conceal, then initiate again our journey towards healthier choices, lest we fall victim to scurvy or worse.