Search directly in specific peer-reviewed journals for the information you need:
Find more peer-reviewed Dietetics journals here
This link will take you to a Summon results page for the peer-reviewed Nutrition/Dietetics journals that we have via Marshall U Libraries. Some of them are print-only, but most of them are available online.
Find marketing-related journals
This link will take you to three journals that contain the words "marketing" and "health" in their titles.