NAD+ — why is it always sold as an IV drip?

NAD+ turns up in clinics as a very expensive infusion. Why the drip specifically?

Because oral NAD+ largely does not get where it is meant to go — it is broken down and the pieces are absorbed rather than the molecule. Which is why most oral products sell a precursor instead and let your cells do the assembly.

The drip is trying to bypass that. Whether it succeeds at raising intracellular NAD+ in the tissues anyone cares about is a separate question from whether it raises it in blood, and it is the question that matters.

evidence: early, which is fair.

And the cost is presumably mostly the clinic rather than the compound.

Presumably.