Age-specific reference ranges are needed to interpret serum methylmalonic acid concentrations in the US population.

CONCLUSIONS: The higher serum MMA concentrations throughout the entire distribution in older persons (especially persons aged ≥70 y) who are vitamin B-12-replete and have normal renal function indicate the need for age-specific MMA reference intervals to better interpret vitamin B-12 status in epidemiologic research. PMID: 31127807 [PubMed - as supplied by publisher]

https://www.ncbi.nlm.nih.gov/pubmed/31127807?dopt=Abstract

Source: The American Journal of Clinical Nutrition - May 24, 2019 Category: Nutrition Authors: Mineva EM, Sternberg MR, Zhang M, Aoki Y, Storandt R, Bailey RL, Pfeiffer CM Tags: Am J Clin Nutr Source Type: research