Some days, we all wish we had a magic elixir to jolt our energy, fend off illness ... or just cure a hangover. That’s likely the appeal of intravenous (IV) vitamin therapy, a growing segment of the $15 billion, largely unregulated medical spa industry involving more than 9,000 facilities across the United States.

An IV infusion of vitamins, minerals, and fluids, IV vitamin therapy delivers nutrients directly into the bloodstream, bypassing normal digestion and enabling immediate absorption. Marketed as a quick fix for fatigue, hangovers, and immune health, the elective procedure typically costs several hundred dollars per session and is rarely covered by health insurance.

While IV therapy for vitamins has some legitimate uses, for most people it’s an invasive solution to a problem that food — or an inexpensive oral supplement — can fix, says Dr. Walter Willett, a professor of epidemiology and nutrition at Harvard’s T.H. Chan School of Public Health.

“I really don’t see any role for it unless someone has a serious medical condition that would make it difficult for them to absorb vitamins,” Willett says.

Who might benefit from IV therapy?

At medical spas, IV drips commonly include ingredients such as vitamin C, B vitamins, magnesium, and electrolytes. The popular “Myers’ cocktail,” for example, includes these nutrients (as well as calcium) and claims to target such disparate conditions as chronic fatigue, migraines, and chronic stress.

In reality, however, Willett says IV vitamin therapy might benefit only a few key groups. These include people with:

“IV therapy is only sometimes needed for these conditions, but it should be guided by a physician,” Willett says. “If someone truly needs IV nutrients, they should be under the care of a doctor.”

Does IV vitamin therapy work?

Because the body immediately absorbs IV hydration (fluids delivered directly into a vein), it might feel effective, Willett notes. But he suspects another contributor. “There’s almost certainly a strong placebo effect from getting IV treatment,” he says. “Pay more than a few bucks for something, and you’ll expect it’s going to make you feel better.”

Research backs up Willett’s perspective. While anecdotal accounts suggest IV vitamin therapy may improve energy levels, mental clarity, and overall well-being, the approach lacks robust scientific evidence to support its use in healthy people eating a balanced diet, according to a scientific review published online June 22, 2025, by Cureus.

Risks and side effects of IV therapy

Here’s a minor, if notable, pitfall to IV vitamin therapy: the body usually excretes any excess of vitamin C and the B vitamins -- essentially creating expensive urine.

Beyond that, however, the treatment poses more significant risks. Since it necessitates an injection, IV therapy can lead to a potentially serious infection. Additionally, excessive amounts of certain nutrients -- particularly the vitamins A, D, E, and K -- can accumulate in tissues, sometimes to dangerous levels.

In extreme cases, people undergoing IV hydration can also develop what’s called fluid overload, meaning too much water can accumulate in blood and tissues, possibly leading to heart or kidney complications. “It can cause cardiac arrest by diluting blood electrolytes,” Willett says. “The whole idea makes me queasy.”

Easy and effective alternatives to IV vitamin therapy

IV vitamin therapy may be ineffective and even risky. Plus, it requires you to visit a medical spa and pay hundreds of dollars. Simpler approaches are not only safer, they’re cheaper and easier, says Willett.

The first and best option to avoid nutrient deficiencies is also the most basic: eat a balanced diet. Fruits, vegetables, nuts, beans, soy foods, whole grains, modest amounts of meat and dairy foods, and healthy fats such as olive oil should dominate your plate day after day, Willett says.

He also advocates taking a daily multivitamin/multimineral supplement, saying it remains a convenient, inexpensive, and practical choice for supplementing your food intake. “A lot of people are marginal in nutrition status, and for many, a standard multivitamin is a good nutritional safety net, costs less than 10 cents a day, and is available at your local pharmacy,” Willett says.

(Maureen Salamon is executive editor of Harvard Women’s Health Watch.)

©2026 Harvard University. For terms of use, please see https://www.health.harvard.edu/terms-of-use. Distributed by Tribune Content Agency, LLC.