In sports nutrition particularly at the pro level, the focus is on being stronger, better, and faster. But one popular new trend may not be as effective as it’s purported to be. Researchers have recently noticed an uptick in the number of athletes—and their coaches—who are turning to vitamin cocktails which are administered either via injection or IV.

The benefits are thought to decrease recovery time and alleviate fatigue. But are the benefits factual? And is this practice safe?

A US News health article says no, quoting a professor of applied sports and exercise science at St. Mary’s University in Twickenham, England, Charles Pedlar. In addition to there being inconclusive evidence that this practice is effective, Pedlar stated, athletes may also be putting themselves at greater risk of infection, as well as putting an unnaturally high amount of nutrients in their systems. Additionally, Pedlar noted in the article, they may risk failing an anti-doping test.

One specific nutrient which is often added to vitamin cocktails for athletes is vitamin B12. A study looked at injecting this vitamin in high doses. The results were shared in the article, “Vitamin B12 Status and Optimal Range for Hemoglobin Formation in Elite Athletes” via Nutrients. The conclusion? “A weak but significant relationship was found between vitamin B12 and hemoglobin concentrations,” the article said.

Pedlar and other sports nutrition experts recommend that athletes stick to consuming their vitamins through foods rather than injecting them, at least until more proven research is shared.

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