does vitamin b12 injection cause sleepiness

does vitamin b12 injection cause sleepiness Feeling Tired All the Time? It Might Be a Deficiency Common & Rare Side Effects

Name: does vitamin b12 injection cause sleepiness Feeling Tired All the Time? It Might Be a Deficiency Common & Rare Side Effects
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Description

This makes sense physiologically

It is important not to self-treat with high-dose B12 supplements before seeing your GP if you suspect deficiency, as this can interfere with diagnostic blood tests and potentially mask underlying conditions such as pernicious anaemia

Stomach acid tends to decrease with age, which makes it harder to extract B12 from food

A B12 injections effect can last anywhere from a couple of weeks to a few months, and the difference comes down to why you are deficient, how well your body holds on to B12, and the dose and schedule you are on