A 2020 study of "wellness" B12 injections in non-deficient adults found no improvement in energy, mood, or cognitive function versus placebo at 4 weeks (Wolffenbuttel et al., Nutrients , 2020)
The peer-reviewed literature is also concentrated within a single research group (Watowich lab, University of Texas at Austin) and its industry partner Ridgeline Therapeutics, with limited independent replication to date
During the physical examination, your doctor will look for a red, beefy tongue, pale or yellowish skin, a rapid pulse, and heart murmurs resulting from an anemia-related increase in blood flow demands on the heart
Here are some possible side effects associated with vitamin injections: Pain or discomfort at the injection site: Some individuals may experience temporary pain, redness, or swelling at the injection site
See the results timeline