IV infusion is the most complete way to deliver NAD+ and the least practical way to keep delivering it. Both halves of that sentence are true, and which half matters depends entirely on whether you are running a short protocol or a long one.
Who this format is for
People doing a defined, intensive, supervised course rather than ongoing maintenance — and who specifically want the procedure to happen in a clinical setting with someone monitoring it.
What an appointment looks like
NAD+ infusions are run slowly. A session commonly takes several hours, and the reason is tolerability rather than caution for its own sake: infused too quickly, NAD+ reliably produces an unpleasant set of sensations — flushing, chest tightness, abdominal cramping, nausea. Slowing the drip controls it. Staff typically titrate the rate against how you are feeling, which is a large part of what you are paying for.
Protocols are usually sold as a series of sessions rather than a single visit, often run over consecutive days or across several weeks.
What you are actually buying
- Complete bioavailability. The dose goes into the bloodstream. No digestive losses, no first-pass metabolism. This is not arguable.
- Supervision. Someone is watching the rate and can respond if you react badly. For some people this is the entire value.
- A finite, scheduled commitment. A course with a start and an end is easier for some people to complete than an open-ended daily habit.
What you are paying for it
Clinic session pricing, multiplied by a protocol. Against a daily capsule measured in tens of dollars a month, the gap is large enough that bioavailability alone does not settle the question. You are also paying several hours of your time per session, on site, repeatedly.
Honest limitations
- It is a spike, not a level. A session raises NAD+ sharply and then it falls. Long-run status is governed by what you do most days.
- The acute effects are routine, not rare. Expect to feel the infusion if the rate is pushed.
- Claims outrun evidence here more than anywhere else in the category. NAD+ infusion is marketed for a very wide range of outcomes. The published human evidence supporting those specific claims is considerably thinner than the marketing volume suggests.
- Quality varies by provider. This is a loosely standardised corner of the market. Sourcing, dosing and protocols differ between clinics.
Related: Oral vs IV, compared properly · Injectable NAD+ · All six formats