If you have a confirmed deficiency of a specific nutrient, or a condition that prevents you from absorbing nutrients delivered orally, IV nutrition might make sense. And if you were severely dehydrated, an IV can be an efficient way to deliver fluids.
But I have grave reservations about these “IV therapy” clinics that are springing up and pumping people full of nutrient cocktails. Although it’s promoted as everything from a hangover cure to energy booster to anti-aging therapy, most of the claims are not supported by evidence and may even be unsafe.
IV fluids may help relieve some of the acute symptoms of a hangover (many of which are due to dehydration), but won’t counteract the other harmful effects of drinking too much. More questionable are the alleged benefits of the vitamins, minerals, and other compounds used in IV therapy.
Supplying nutrients in excess of the body’s needs will not make your cellular processes work better or faster, any more than over-filling your gas tank will make your car run faster.
High doses of antioxidants can even shut down the body’s own antioxidant mechanisms.
There are also general risks associated with any IV therapy, such as infection or hematoma.
Those administering IV therapy may be well-meaning but uninformed, or they may simply be out to make a buck. Given the lack of regulation and oversight (and research), I think I’d steer clear.