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Published on: May 10, 2016
Smoking and plasma homocysteine
P O'Callaghan1, R Meleady, T Fitzgerald
1The Adelaide and Meath Hospital Dublin, Dublin, Ireland.
European Heart Journal
|September 27, 2002
Summary
Smokers with high plasma homocysteine face a significantly increased cardiovascular disease risk. Smokers also exhibit lower B-vitamin levels, suggesting potential benefits from supplementation and smoking cessation advice.
Area of Science:
- Cardiovascular Disease Research
- Nutritional Biochemistry
- Smoking Cessation Science
Background:
- Smoking is a known risk factor for cardiovascular disease (CVD).
- Elevated plasma homocysteine levels are independently linked to increased CVD risk.
- B-vitamins play a crucial role in homocysteine metabolism.
Discussion:
- This study investigated the interplay between smoking, homocysteine, B-vitamins, and CVD risk in a large European case-control cohort.
- Results indicate a synergistic effect between smoking and high homocysteine, dramatically elevating CVD risk.
- Smokers demonstrated lower levels of folate, vitamin B6, and vitamin B12 compared to non-smokers.
Key Insights:
- Smokers with plasma homocysteine above 12 micromol/L had a 12-fold increased risk of CVD.
- The heightened CVD risk associated with smoking persisted even after adjusting for B-vitamin levels.
- Reduced B-vitamin levels in smokers may stem from direct smoking effects or lower dietary intake.
Outlook:
- Smokers identified with high homocysteine levels require targeted interventions, including intensive smoking cessation support.
- Supplementation with folate, vitamin B6, and vitamin B12 may be beneficial for smokers with elevated homocysteine.
- Further research is warranted to elucidate the precise mechanisms linking smoking, B-vitamins, homocysteine, and CVD pathogenesis.
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