About half of people taking GLP-1 weight-loss drugs start new vitamins or supplements after beginning treatment, according to a Nutrition Business Journal survey cited by Reuters. Probiotics, protein, and fiber are among the most popular choices.
None of those products need approval from the Food and Drug Administration before they are sold. That gap is drawing concern from doctors and federal health officials as supplement makers and social media influencers market products directly to GLP-1 users.
