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Most B12 in the UK is injected into muscle, but the fatty subcutaneous route is a recognised alternative

It causes the immune system to release a flood of chemicals that can lead to a potentially fatal condition known as anaphylactic shock

Clinical improvement was also observed in oxidative stress markers, with improvements in methionine levels (p=0.05), homocysteine levels (SAH, p=0.007) and the ratio of S-adenosylmethionine (SAMe) to SAH (p=0.007), indicating improvement with methylation at the cellular level and a decrease in oxidative stress in the body 2