Could a simple regimen of nutritional supplements strengthen the aging brain against dementia? This newly published trial suggests vitamin B12 could sharper cognitive faculties and even turn back time for the forgetful.

A new clinical trial published in Nutrición Hospitalaria provides compelling evidence that high-dose vitamin B12 supplementation significantly improves cognitive function in older adults already exhibiting decline ^[1].

The vitamin B12 treatment group received 500mg intramuscular injections daily for one week followed by oral doses of 0.25mg cobamamide plus 0.50mg methylcobalamin daily for 6 months ^[1]. This B12 regimen markedly enhanced performance on common mental tests versus matched controls receiving no B12 ^[1]. Those getting B12 supplements notably improved attention, numeric calculation and visual-spatial skills indicative of better frontal lobe brain activity ^[1].

Rising rates of “minimal cognitive impairment” affecting over 20% of older adults render findings timely ^_[2]. Patients frequently progress to dementia within a year if left untreated ^[3]. Prior research also links low B12 levels below 180pg/mL to eventual cognitive losses ^[4].  

Vitamin B12 supports red blood cell formation, immune function and nerve communication ^[5]. Deficiencies frequently appear after age 60, often from stomach conditions or medications reducing B12 absorption ^[6]. Strict vegetarians also require supplementation as natural B12 derives from animal foods ^[5]. 

Suboptimal B12 disturbs homocysteine metabolism and methylation reactions vital for synthesizing neurotransmitters and brain cell integrity ^[7]. Resulting neurologic symptoms span depression, confusion and frank dementia if B12 levels significantly drop ^[8].  

Notably, the 500mg injectable B12 doses increased blood B12 while decreasing depressive mood ^[1]. Patients also exhibited better frontal lobe integrity governing complex attention, mental flexibility and emotional processing after 6 months treatment ^[1]. Correcting B12 deficiency may thereby restore key cell nutrients enabling clearer thinking.  

Authors recommend screening B12 blood levels in all adults over 50 years exhibiting cognitive issues or unexplained fatigue ^[1]. Customized B12 treatment then becomes possible for those indicating borderline or overt deficiencies. As covered by insurance, accurate B12 testing and correction provides low-risk intervention before irreversible dementia develops.