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Why does artificial feeding raise ethical and religious controversies?

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Marble portrait bust of Hippocrates atop a tall rectangular base inscribed with an epigram in Greek, displayed against a black background. — Bioethics A Roman bust of Hippocrates, copied from a Greek original, c. 3rd century bce; in the collection of the Antichità di Ostia, Italy.

Artificial feeding, such as tube feeding, raises ethical and religious controversies because it challenges the interpretation of the duty to preserve human life. While medical ethics and law generally uphold the right of competent individuals to refuse any medical treatment, the withdrawal of artificial nutrition and hydration is often viewed differently than the withdrawal of other life-sustaining interventions, such as mechanical ventilators.1

Many religious groups argue that providing food and water is a basic form of care rather than a medical treatment, and therefore, withholding it is morally unacceptable. This perspective often emphasizes the sanctity of life, suggesting that removing such support is equivalent to causing death. In contrast, the legal and clinical consensus—supported by institutions like the American Medical Association—maintains that artificial feeding is a medical intervention that a patient or their proxy has the right to refuse, particularly when it no longer serves the patient's best interests or aligns with their previously expressed wishes. These disputes highlight the tension between the ethical principle of patient self-determination and deeply held moral or religious convictions regarding the preservation of life.1