Can B12 Keep You Sharp?

Posted by Whole Health Web Admin | Oct 6, 2016 | Alzheimer's Diseae/Dementia, Research Articles, Vitamins, Minerals and Supplements | 0 |

Methylmalonic Acid, Vitamin B12, and Cognitive Decline

Serum methylmalonic acid (MMA) is a sensitive and specific marker of vitamin B12 deficiency; MMA levels rise when B12 status is inadequate. While elevated homocysteine has also been linked to cognitive decline, it is less specific for B12 deficiency than MMA.

A prospective study published in Neurology (2009;72:361–367) followed 516 participants from the Chicago Health and Aging Project over six years. Cognitive function was assessed at years three and six and correlated with serum vitamin B12 and MMA levels.

Higher serum MMA levels were associated with a faster rate of cognitive decline, while higher serum vitamin B12 levels were associated with a slower rate of decline. The authors concluded that vitamin B12 and MMA may be more relevant predictors of cognitive decline than homocysteine, particularly in older adults exposed to folic acid fortification and supplementation.

About The Author

Whole Health Web Admin

Whole Health Web is an educational health resource focused on nutrition, lifestyle, and the foundational biology that supports long-term wellness. The site explores how diet, micronutrients, stress, and daily habits influence health over time, emphasizing balance and resilience rather than isolated symptoms. Content on Whole Health Web is research-informed and educational in nature, designed to help readers better understand the body’s systems and to support informed discussions with healthcare providers. Natural therapies are presented as supportive tools—not substitutes for appropriate medical care.