Homocysteine – What Is This Substance, Normal Levels, Testing, Hyperhomocysteinemia… How to Lower Homocysteine Levels?
David Janitzek
2026-03-22
9 min. read
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Depending on whether the folic acid metabolic processes in the body are functioning correctly, subsequent reactions depend on them, including the conversion of a crucial amino acid, which is homocysteine, and disorders in these reactions lead to a series of unwanted health consequences in the body, including the development of atherosclerosis, heart diseases, stroke, hypertension, mental and neurological disorders.
Homocysteine: Definition, Metabolic Pathways, and Clinical Significance in Cardiovascular Health
Homocysteine is a sulfur-containing amino acid produced in the body as a byproduct of methionine metabolism—an essential amino acid obtained through diet. Its metabolic conversions rely on critical cofactors such as folic acid, vitamin B12, and vitamin B6, and disruptions in these pathways may lead to the accumulation of this compound in the bloodstream, which is associated with an elevated risk of cardiovascular and neurodegenerative diseases. This article explores the biochemistry of homocysteine, the factors influencing its concentration, and the clinical implications of hyperhomocysteinemia, incorporating the latest findings from epidemiological and molecular research.
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