Polyunsaturated fatty acids in cardiovascular diseases: uncertainty prevails

Area of Science:

• Cardiovascular Medicine
• Nutritional Science
• Public Health

Background:

• Observations in Greenland Inuit populations in the late 1970s suggested a link between diet and lower myocardial infarction rates.
• This led to extensive research into polyunsaturated fatty acids (PUFAs) for cardiovascular disease (CVD) prevention.

Purpose of the Study:

• To review the current, often inconsistent, evidence regarding the role of PUFAs, particularly n-3 PUFAs, in cardiovascular health.
• To address key questions about the specific benefits of eicosapentaenoic acid, optimal PUFA dosing, and patient selection for n-3 PUFA treatment.

Main Methods:

• Review of seminal clinical trials (e.g., GISSI‑Prevenzione, JELIS, PREDIMED, ASCEND) assessing n-3 PUFA effects on cardiovascular outcomes.
• Analysis of divergent results and methodologies across studies.

Main Results:

• Evidence supporting the preventive value of PUFAs for cardiovascular disease is currently inconsistent.
• Seminal trials reported divergent findings regarding the cardiovascular effects of n-3 PUFAs.

Conclusions:

• The precise role and optimal application of n-3 PUFAs in cardiovascular disease prevention remain subjects of ongoing investigation.
• Further research is necessary to determine which specific PUFAs, at what doses, and for which patient populations n-3 PUFA treatment is most beneficial.