Breast milk is a highly valued substance, immunologically and nutritionally, which also signifies maternal care and love for the infant. This intersection of biological and cultural qualities confers breast milk with complex meanings, which necessarily shape the experience of breastfeeding. Our research, investigating the experience of lactation after the loss of an infant, casts a novel light on these meanings. This article analyses the experience of 17 Australian bereaved mothers and 114 health professionals charged with their care. We find that while all the mothers found post-loss lactation emotionally painful, many also found redemptive meaning in their milk-production, as a bond with the lost child, as confirmation of their maternal competence and as a life giving substance that they could donate to other needy infants. These complex meanings and positive connotations were at odds with hospital cultures that regard post-loss lactation as valueless and best dealt with through medical suppression, despite the more complex insights of individual health-care professions.