A nice paper with an intriguing conclusion:
Our data suggest that supplementing individuals should consciously scrutinize their supplement intake and ideally seek healthcare professional support to determine the precise need of supplements. The lack of guidelines on supplement dosage and frequency for individuals following plant-based diets renders these
individuals particularly vulnerable to both under- and oversupplementation, with the latter incurring greater financial costs.

Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC11915235/pdf/10.1177_15598276251319305.pdf