Donation for research purposes may differ in important ways from donation for treatment purposes. While both forms of donation seek to benefit others, the contribution that any one research donor or healthy volunteer makes to the health of any other identifiable person is exceptionally hard to pin down. A move away from a primarily altruistic model in donation for research purposes may therefore pose a lesser challenge to solidarity and common values than such a move in connection with donation for treatment. We take seriously concerns that some approaches to increasing the supply of bodily material may risk.