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According to NICE guidance, hydroxocobalamin injections are the recommended first-line treatment for pernicious anaemia and other malabsorption-related deficiencies

Side effects are rare and usually mild (slight injection-site soreness)

This means they dont trigger IGF-1 production, dont promote cell proliferation, and dont cause the insulin resistance or blood sugar disruption associated with full-length HGH

These include redness, itching, pain, swelling, and rash

Thus, a deficiency in vitamin B12 may impact the production and function of those neurotransmitters

Some of the most common symptoms of vitamin B12 deficiency are fatigue, memory issues, insomnia, stomach issues, etc