Although organ donation conflicts with self-interest, because donation is vital to the community, interventions to increase it are ethically justified.
AMA J Ethics. 2016; 18(2):156-162. doi:
10.1001/journalofethics.2017.18.2.msoc1-1602.
Vegan patients screened for vitamin and mineral deficiencies might benefit from supplements, but physicians are obliged to discuss lack of regulation in the supplement industry and possible risks.
AMA J Ethics. 2018; 20(11):E1025-1032. doi:
10.1001/amajethics.2018.1025.