PMID- 33000166 OWN - NLM STAT- MEDLINE DCOM- 20210125 LR - 20230216 IS - 1541-6100 (Electronic) IS - 0022-3166 (Linking) VI - 150 IP - Suppl 1 DP - 2020 Oct 1 TI - Metabolic Consequences of Supplemented Methionine in a Clinical Context. PG - 2538S-2547S LID - 10.1093/jn/nxaa254 [doi] AB - The central position of methionine (Met) in protein metabolism indicates the importance of this essential amino acid for growth and maintenance of lean body mass. Therefore, Met might be a tempting candidate for supplementation. However, because Met is also the precursor of homocysteine (Hcy), a deficient intake of B vitamins or excessive intake of Met may result in hyperhomocysteinemia (HHcy), which is a risk factor for cardiovascular disease. This review discusses the evidence generated in preclinical and clinical studies on the importance and potentially harmful effects of Met supplementation and elaborates on potential clinical applications of supplemental Met with reference to clinical studies performed over the past 20 y. Recently acquired knowledge about the NOAEL (no observed adverse effect level) of 46.3 mg . kg-1 . d-1 and the LOAEL (lowest observed adverse effect level) of 91 mg . kg-1 . d-1 of supplemented Met will guide the design of future studies to further establish the role of Met as a potential (safe) candidate for nutritional supplementation in clinical applications. CI - (c) The Author(s) 2020. Published by Oxford University Press on behalf of the American Society for Nutrition. FAU - Ligthart-Melis, Gerdien C AU - Ligthart-Melis GC AD - Center for Translational Research in Aging & Longevity, Department of Health & Kinesiology, Texas A&M University, College Station, Texas, USA. FAU - Engelen, Marielle P K J AU - Engelen MPKJ AD - Center for Translational Research in Aging & Longevity, Department of Health & Kinesiology, Texas A&M University, College Station, Texas, USA. FAU - Simbo, Sunday Y AU - Simbo SY AD - Center for Translational Research in Aging & Longevity, Department of Health & Kinesiology, Texas A&M University, College Station, Texas, USA. FAU - Ten Have, Gabrie A M AU - Ten Have GAM AD - Center for Translational Research in Aging & Longevity, Department of Health & Kinesiology, Texas A&M University, College Station, Texas, USA. FAU - Thaden, John J AU - Thaden JJ AD - Center for Translational Research in Aging & Longevity, Department of Health & Kinesiology, Texas A&M University, College Station, Texas, USA. FAU - Cynober, Luc AU - Cynober L AD - Department of Clinical Chemistry, Hopital Cochin, Hopitaux Universitaires Paris Centre, Paris, France. FAU - Deutz, Nicolaas E P AU - Deutz NEP AD - Center for Translational Research in Aging & Longevity, Department of Health & Kinesiology, Texas A&M University, College Station, Texas, USA. LA - eng PT - Journal Article PT - Review PL - United States TA - J Nutr JT - The Journal of nutrition JID - 0404243 RN - 0 (Proteins) RN - 0LVT1QZ0BA (Homocysteine) RN - 12001-76-2 (Vitamin B Complex) RN - AE28F7PNPL (Methionine) SB - IM MH - Animals MH - Body Fluid Compartments/*metabolism MH - Cardiovascular Diseases/*etiology/metabolism MH - *Dietary Supplements MH - Female MH - Homocysteine/*metabolism MH - Humans MH - Hyperhomocysteinemia/*etiology/metabolism MH - Male MH - *Methionine/adverse effects/metabolism/pharmacology/therapeutic use MH - Proteins/metabolism MH - Vitamin B Complex/blood MH - Vitamin B Deficiency/blood/*complications OTO - NOTNLM OT - LOAEL OT - NOAEL OT - cardiovascular disease OT - homocysteine OT - hyperhomocysteinemia OT - lean body mass OT - methionine EDAT- 2020/10/02 06:00 MHDA- 2021/01/26 06:00 CRDT- 2020/10/01 05:39 PHST- 2019/12/10 00:00 [received] PHST- 2020/04/01 00:00 [revised] PHST- 2020/07/31 00:00 [accepted] PHST- 2020/10/01 05:39 [entrez] PHST- 2020/10/02 06:00 [pubmed] PHST- 2021/01/26 06:00 [medline] AID - S0022-3166(22)02436-1 [pii] AID - 10.1093/jn/nxaa254 [doi] PST - ppublish SO - J Nutr. 2020 Oct 1;150(Suppl 1):2538S-2547S. doi: 10.1093/jn/nxaa254.