IV Vitamin Drips: What They Can and Cannot Do

IV drips are sold for hangovers, immunity, energy and glowing skin, from lounges and from vans that come to your door. Here is what that actually does and does not accomplish.

What a drip can do

It delivers fluid quickly. A liter of saline goes in over 30 to 60 minutes, and for someone who is genuinely dehydrated from vomiting, heat illness or a stomach bug they cannot keep fluids down through, that is real medicine.

It delivers a nutrient to someone who truly cannot absorb it or is truly short of it. A person with iron deficiency who does not tolerate or respond to oral iron gets an iron infusion. Someone whose stomach surgery or gut disease stops them absorbing B12 gets it by injection. In each case there is a measured deficiency, a reason the mouth route failed, and a number to recheck afterward.

What a drip cannot do

Most drip menus are built on water soluble vitamins, mainly vitamin C and the B group. In a person whose levels are normal, the body has little use for the extra. The kidneys filter it out within hours, and the surplus leaves in the urine. There is no good evidence that pushing vitamin C above a normal level makes the immune system work better in a healthy person.

Hangovers are a mix of dehydration, poor sleep, inflammation and the byproducts of alcohol breakdown. The fluid in a drip addresses the first part. Water and time address it too, at no cost.

The "energy" people describe afterward is usually the liter of fluid plus 45 minutes lying still in a quiet room. Neither needed a needle.

A drip is also not free of risk. Any IV carries a small chance of infection or vein irritation. High dose vitamin C can raise oxalate in the urine, which matters for people prone to kidney stones, and it can trigger red blood cell breakdown in people with a G6PD enzyme deficiency.

Why we test first

Before anyone puts a nutrient in a vein, the question is which number it is fixing. We check ferritin, B12, vitamin D and the rest on a panel. If something is low, we correct it by the cheapest route that works, which is usually a tablet, and we recheck in a few months. The IV route is for the cases where the gut cannot do the job or oral replacement has already been tried and failed.

A low ferritin corrected over three months often changes how a person feels. A bag of vitamins in someone with normal levels mostly ends up in their urine.

If somebody is offering to put something in your vein, it is reasonable to ask what measurement it is based on.

This article is educational and is not medical advice.

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