On the Road to Holistic/Integrative Medicine

N-of-1 reasoning widens naturally into holistic medicine, a term that should be rescued from its history.

Two claims are bundled in the term. The first is descriptive: health is a property of an interacting whole, so that a perturbation in one domain propagates into the others. The second is procedural: care should therefore be assembled across domains and modalities instead of delivered from within one. The first is a statement of complexity science, the second a statement about how services should be organized. They are frequently confused, and the confusion is the source of most of the argument about the term.

Holistic medicine is the natural widening of N-of-1 medicine, not an alternative to it. If the object of care is a particular person rather than a member of a class, what counts as data about that person cannot be settled in advance by discipline. The N-of-1 ambition, pursued honestly, forces the aperture open.

It opens along two axes. The first is the range of data. A twin built only from omics, imaging, and laboratory values models a body. The person also has a psychological state, a sleep architecture, a diet, a household, an income, a neighborhood, an exposure history, and beliefs about what is happening to them, each measurable, each moving the physiology, and several predicting outcome better than the molecular variables do. Excluding them is a modeling choice naturalized by the boundaries of specialties, not rigour.

The second axis is the range of what may be done. Conventional practice draws overwhelmingly on two therapeutic modalities, the pharmaceutical and the procedural or radiologic. The available repertoire is considerably wider: structured exercise and physical therapy; nutrition; sleep intervention; psychological and behavioral therapies; mind-body practice; social prescribing; manual and movement-based approaches; and neuromodulatory and device-based options fitting none of the old categories. Several carry evidence comparable to the drugs they might displace, particularly in chronic pain, depression, and metabolic disease, and they are under-used less because they fail than because they are not reimbursed, not prescribed by habit, and not taught as therapeutics.

An intervention with evidence behind it, available now, failing to reach the patients it would help for reasons of organization, not science, is the translational gap of Chapter II reappearing inside the clinic instead of upstream of it. The drivers are the same ones: no reimbursement code; no owner; no place in the curriculum; and no commercial actor with a reason to press for it.

The analysis that made the translational gap a made problem applies here without modification, and so does its consequence, since a problem made by arrangements can be unmade by rearranging them. Exercise prescribed with the specificity of a drug, sleep treated as a therapeutic target, and social prescribing with a referral pathway attached are not frontier science. They are unconverted evidence, and the conversion is the work.

The history of the term explains the wariness it attracts. What was called holistic in the nineteen-sixties became alternative in the eighties, defined by standing outside conventional medicine, and then complementary, defined by standing alongside it. The institutional record tracks the vocabulary: an Office of Alternative Medicine in 1991, a National Center for Complementary and Alternative Medicine in 1998, renamed the National Center for Complementary and Integrative Health in 2014.²¹Integrative was the decisive change, naming a relation, not a position. The current term of art is whole person health, helping individuals, families, and communities improve health across interconnected biological, behavioral, social, and environmental domains.²¹

Whole person health is holism with an evidentiary discipline attached. It asks that standards be applied to non-pharmacological modalities, not relaxed for them, and that is what distinguishes the rescued term from its history. An N-of-1 medicine that measures the whole person and then declines to consider interventions outside two modalities is precise about a fragment.