However, with direct injection, if you do not need the additional B12, it may result in high levels in your blood that can cause side effects including gastrointestinal issues, headache and dizziness, tiredness and weakness, or skin irritation until the excess is flushed out via your kidneys and urine
Also see: 8 Supplements That May Help Treat Peptic Ulcers And Some to Avoid Symptoms of B-12 Deficiency August 29, 2023 Be aware that vitamin B-12 deficiency can cause a range of side effects
10.4414/smw.2017.14421 36 MoherD.LiberatiA.TetzlaffJ.AltmanD
If you see any cloudiness, discoloration, or particulates in the water, do not use it
Because of this, it's generally considered safe for most people
See a healthcare provider if you have side effects, if your symptoms get worse, or if you have questions about your treatment