Research that places subjects and investigators at risk of additional harm must be considered carefully.

International humanitarian law obliges clinicians to coordinate with local civilian, military, and nongovernment organizations, and implementation isn't easy.

Clinicians in postconflict health care settings can be tasked with caring for patients who were enemies.

Crises can require all clinicians to modify practice priorities during extreme circumstances.

Some allopathic clinicians’ biases influence the information they draw upon to make decisions and offer recommendations.

Helping patients mitigate their risk of chronic disease is key, but dietary supplements are risky.

Children with micronutrient deficiency might need supplementation, sometimes in irregularly high doses.

Consumption of over-the-counter vitamins, minerals, and herbals is widespread, but clinicians lack critical information about their use.

Label analysis is key to educating patients about risks of vitamin A-containing supplements.

Physicians must respond with care to all patients’ health needs, even those demanding complex, expensive interventions.