Neurological changes A lack of vitamin B12 can cause neurological problems, which affect your nervous system, such as: vision problems memory loss pins and needles loss of physical co-ordination (ataxia), which can affect your whole body and cause difficulty speaking or walking damage to parts of the nervous system (peripheral neuropathy), particularly in the legs If neurological problems do develop, they can sometimes be irreversible
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How GLP-1 medications work : - In your brain: They act on appetite centers (especially the hypothalamus) to make you feel full sooner and reduce food cravings and reward-driven eating