If the needle is too short for the person, or the angle is wrong, the dose can end up in subcutaneous fat, where absorption is slower and less predictable
About the reviewerView full bio Dr Doug McKechnie, MRCGP Medical Writer MA, MBBS, MSc, DRCOG, MRCP(UK), MRCGP(2021), FHEA Dr Doug McKechnie is an NHS GP working in London
Symptoms of Vitamin B-12 Deficiency Fatigue and Weakness Low Moods Low Concentration Level Loss of Appetite Constipation Poor Memory Vitamin B-12 is a water-soluble vitamin necessary for the normal function of the brain and central nervous system, formation of blood cells and metabolism of every cell
Learn More Learn More A simple guide to vitamin shots B12 for energy, vitamin D for winter support, glutathione for skin how they differ and how to choose
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