can b12 injection cause fever Vitamin Injections Side Effects & Reactions · PA Relief Feeling worse after B12 Injection:

After he died in 1984, other physicians and naturopaths took up prescribing "intravenous micronutrient therapy" with unsubstantiated health claims for treating fatigue, low energy, stress, anxiety, migraine, depression, immunocompromised, promoting weight loss, and more

It is found in about 0.1% of the overall population, but it is much more common in older adults

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Homocysteine and lipids: S-Adenosyl methionine as a key intermediate

It helps to convert fat and protein into energy for the body, and B-12 helps in the formation of red blood cells