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B12 is a key player in the production of the mood-regulating chemical serotonin and when your body is lacking the vitamin, production can decrease

The most common B12 subcutaneous injection sites are the following: The upper arm To self-administer a B12 injection into the arm, pinch a thick skin layer of the side or back of the upper arm and insert the needle at a right angle

While this may not be true for EACH and EVERY person, its still worth considering

Understanding this distinction is important for patients experiencing digestive symptoms whilst taking B12 supplements

Opt for needles with reduced dead space