Vitamins are magic. Especially when they’re injected. Roll up the sleeve, find a vein, insert a needle and watch that colourful concoction flow directly into the bloodstream. It may sound somewhat illicit, but that person infusing it is wearing a white coat, and you’re sitting in a chic clinic. There must be something to it, right? Intravenous vitamin injections are popular with celebrities and have even been described by Dr. Oz as “cutting edge”. Advocates claim vitamin injections can benefit serious conditions like cancer, Parkinson’s disease, macular degeneration, fibromyalgia, depression, and that modern-day obsession, “detoxification”. And vitamin infusions aren’t just for the ill. They’re also touted as helpful for preventing illness, too. A search for vitamin injections brings up millions of hits and dozens of advertisements. There is no question that vitamin injections are popular. But despite all the hype and all the endorsements, there is no credible evidence to suggest that routine vitamin infusions are necessary or offer any meaningful health benefit. Vitamin infusions are a marketing creation, giving the illusion you’re doing something for your health, but lacking any demonstrable efficacy. What’s more concerning, providers of vitamin therapies target their marketing at those fighting life-threatening illnesses like cancer, selling unproven treatments in the absence of good scientific evidence that they are beneficial.
The intravenous vitamin industry is a sideshow to science-based health care. Yes, there is an established medical role for injectable vitamins, though it’s no energy-boosting cure-all – they’re used to replace what we should obtain in our diet. As a hospital-based pharmacist I used to prepare sterile bags of total parenteral nutrition (TPN), a mixture of vitamins, carbohydrate, protein and fat that completely replaced the requirement to eat. TPN is effective, but not without risks, and far less preferable than getting your nutrients the old fashioned way – by eating them. There’s also the routine use of injectable vitamins like B12, or iron, all of which can be science-based when used to address true deficiencies, or to manage specific drug toxicities. And there is the therapeutic use of high-dose minerals like intravenous magnesium for acute asthma attacks. But there is no medical justification to infuse vitamins into a vein when you can more appropriately obtain those nutrients in your diet.