Final answer:
A disadvantage for undergraduate health psychologists is that they cannot pursue medicine in higher education.
Step-by-step explanation:
A disadvantage for students who are trained as health psychologists at the undergraduate level is that they cannot pursue medicine in higher education. While a bachelor's degree in psychology can lead to various careers, including case managers, sales, and teaching, medical schools usually require a doctoral degree (PhD) to pursue medicine. There are alternative healthcare professions where a psychology background can be helpful, but pursuing medicine would generally require further education beyond the undergraduate level.