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Another study published in the Journal of the American Geriatrics Society found that B12 supplements improved memory and cognitive function in older adults with mild cognitive impairment

Intramuscular Injection Methods Intramuscular injections go directly into a muscle

Metabolic effects of social isolation in adult C57BL/6 mice (in Eng)

Subcutaneous injections are also highly effective and can be a gentler option for maintenance, offering a slow and steady release

Factors such as initial B12 levels, underlying medical conditions, certain medications, advanced age, and injection frequency can affect the absorption and utilization of B12, possibly shortening the duration of action

Patients considering it should always do so under the supervision of a qualified professional who can weigh potential benefits against these risks