Methionine is also helpful in preventing fatigue and may be useful in some cases of allergies as it can reduce histamine release
The CDC explains that preservatives help limit bacterial growth but do not provide complete protection
and has other pharmacological activities including intestinal disorders, abdominal pain, diarrhea, dementia-related conditions, as well as enhancing cognitive performance and being aphrodisiac and anti-polyuric (Wang et al., 2015)
They can assess your individual needs, recommend the most appropriate dosage of vitamin B12 booster, and monitor your health status over time
There are far worse things to have and I'm okay with that as an answer
It is explicitly banned by the World Anti-Doping Agency (WADA) and the United States Anti-Doping Agency (USADA) under the Peptide Hormones, Growth Factors, and Related Substances category