Via Negativa

Via negativa is improvement by subtraction, and it is the least marketable idea in medicine. The largest and most durable gains in health almost always come from removing what harms rather than adding what might help. Stop smoking. Treat the high blood pressure. Repair the broken sleep. Cut the excess alcohol. Stop the medication that is no longer earning its place. None of it trends, because there is nothing to sell in telling a person to do less.

The name comes from an old way of reasoning about hard problems: when you cannot be sure what will help, you can often be quite sure what is hurting, and removing the known harm is the safer bet. In evidence-based longevity medicine, that bet usually wins, and it usually wins by a wide margin.

Why subtraction beats addition

The two directions have very different risk profiles, and that asymmetry is the whole argument. What we should remove tends to be well established, because the harms of smoking, untreated hypertension, poor sleep, and excess alcohol have been studied for decades in large populations. What we might add tends to be the opposite: supplements, peptides, and protocols with small and uncertain effects, thin evidence, and combinations that no one has studied at all.

So the downside of subtraction is small and the upside is proven, while the downside of addition is unknown and the upside is usually modest at best. When you are making decisions under uncertainty, and in prevention you always are, you take the move whose worst case is mild and whose benefit is real. That is subtraction almost every time.

Deprescribing as medicine

The clearest example is deprescribing, the deliberate removal of a medication that is doing less good than harm. It is one of the most valuable things I do and one of the least visible. Every drug carries costs: side effects, interactions, the burden of taking it, and the false comfort of feeling treated. Over years, people accumulate prescriptions the way a house accumulates clutter, each added for a reason that may no longer hold.

Reviewing that list and removing what no longer earns its place often improves how a person feels more than anything I could add. It rarely makes anyone feel like a hero, mine or theirs, because taking something away does not have the ceremony of starting something new. But it is frequently the intervention with the largest real effect, and I would rather do the thing that works than the thing that feels impressive.

The harder, better question

The wellness reflex is to ask what we can add. More supplements, more compounds, more protocols, a longer stack. Via negativa asks the harder and more useful question: what can we safely take away? It is harder because it requires admitting that some of what we are already doing is not helping, and that is never a comfortable admission for anyone.

Where addition earns its place

None of this makes addition wrong, and it would be dishonest to pretend otherwise. Some things are worth adding, and adding them is real medicine: treating a genuine deficiency, starting a drug with strong evidence for someone who clearly needs it, building the exercise, sleep, and nutrition that everything else rests on. Addition has its place, and it is a large one.

The claim is only about order and about the burden of proof. Remove the known harms first, because that is where the evidence is strongest and the risk is lowest. Then add, deliberately, and only when the case for a particular addition is genuinely strong.

But subtraction is where the evidence is strongest and the risk is lowest, and it is where I start with nearly every patient. Add only after the removing is done, and only when the case for adding is genuinely strong. Most of the time, the shortest path to better health is a shorter list.