Nutritional
Homocysteine
A sulfur-containing amino-acid metabolite influenced by vitamins, genetics and kidney function.
What it measures
Plasma total homocysteine.
Why it matters
Associated with vascular risk and useful in selected diagnostic contexts.
How to interpret it
Interpret with B-vitamin status, renal function, medications and clinical indication.
Important limitations
Lowering an associated biomarker does not automatically translate into lower event risk; not a direct aging measure.
Evidence status
Established risk / function marker
Risk-associated biomarker with context-dependent clinical utility.
Research & guidance
Original papers, validation studies, reviews and clinical guidance connected to this measurement.
systematic review of randomized trials
Homocysteine-lowering interventions for preventing cardiovascular events
Cochrane Database of Systematic Reviews · 2015
Supports the distinction between an associated biomarker and a validated causal treatment target: lowering homocysteine did not clearly prevent major cardiovascular events.
meta-analysis of randomized trials
Effects of lowering homocysteine levels with B vitamins on cardiovascular disease, cancer, and cause-specific mortality: Meta-analysis of 8 randomized trials involving 37 485 individuals
Archives of Internal Medicine · 2010
B vitamins lowered homocysteine but did not significantly reduce major vascular events or all-cause mortality in the populations studied.
For education and evidence exploration, not diagnosis or individualized medical advice.