B12 deficiency is treatable, it is worth testing when symptoms appear.
5. Memory Problems or Brain Fog
Low vitamin B12 can affect thinking and mental clarity. Some people feel forgetful, slow, confused, or mentally foggy. They may struggle to focus, remember words, or keep track of tasks.
This can be frightening, especially in older adults, because it may be mistaken for dementia. But vitamin B12 deficiency is one of the health problems doctors may check when someone develops memory or thinking changes.
MedlinePlus notes there is no evidence that B12
