What is the clinical evidence from this study?

Study design: Cohort. Population: Healthy adults (free of diabetes, cardiovascular disease, and cancer) (n=127536). Intervention: Polyunsaturated fatty acids (PUFAs) vs. Saturated fats. Primary outcome: Incident cases of coronary heart disease (CHD) (HR 0.75, 95% CI 0.67 to 0.84, p=< 0.0001).

What question did this study set out to answer?

This study investigates how saturated fats compare with unsaturated fats and carbohydrate sources in relation to coronary heart disease (CHD) risk.

June 29, 2026Journal of the American College of CardiologyOpen Access

Saturated Fats Compared With Unsaturated Fats and Sources of Carbohydrates in Relation to Risk of Coronary Heart Disease

Q: What are the key findings of this study?

Replacing 5% of energy intake from saturated fats with polyunsaturated fatty acids was associated with a lower risk of coronary heart disease (HR 0.75; 95% CI 0.67-0.84; p<0.0001).

Q: What question did this study set out to answer?

This study investigates how saturated fats compare with unsaturated fats and carbohydrate sources in relation to coronary heart disease (CHD) risk.

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Key result

Replacing saturated fats with polyunsaturated fats is linked to ~25% lower CHD risk.

HR 0.75
95% CI 0.67 to 0.84
P<0.0001
n=127,536

Why the study?

Does replacing dietary saturated fats with unsaturated fats or whole grain carbohydrates reduce the risk of incident coronary heart disease in adults free of baseline cardiovascular disease?

Population

127,536 adults free of diabetes, cardiovascular disease, and cancer at baseline.

Comparison

Replacing 5% of energy intake from saturated… vs Dietary saturated fats or carbohydrates from…

Design

Cohort

Follow-up

24 to 30 years

Authors

YLYanping LiBGI Group (China)AHAdela HrubyVirginia Tech ABAdam BernsteinThales (Portugal)

Discussion

Member takes

Implication

Replacing dietary saturated fats with unsaturated fats (especially PUFAs) or high-quality carbohydrates from whole grains significantly reduces the risk of incident coronary heart disease.

Key Points

This study investigates how saturated fats compare with unsaturated fats and carbohydrate sources in relation to coronary heart disease (CHD) risk.
Followed 84,628 women from the Nurses’ Health Study and 42,908 men from the Health Professionals Follow-up Study.
Food frequency questionnaires were administered every 4 years to assess dietary intake.
Analyzed dietary fat and carbohydrate consumption over 24 to 30 years of follow-up.
Higher intakes of polyunsaturated fatty acids (HR 0.80, 95% CI 0.73 to 0.88, p trend <0.0001) and whole grain carbohydrates (HR 0.90, 95% CI 0.83 to 0.98, p trend = 0.003) are linked to reduced CHD risk.
Replacing 5% of saturated fat intake with PUFAs results in a 25% lower risk of CHD (HR 0.75, 95% CI 0.67 to 0.84, p < 0.0001).
Refined starches/added sugars show a positive association with CHD risk (HR 1.10, 95% CI 1.00 to 1.21, p trend = 0.04).

Study Design

Type

Cohort (n=127,536)

Structured PICO

Does replacing dietary saturated fats with unsaturated fats or whole grain carbohydrates reduce the risk of incident coronary heart disease in adults free of baseline cardiovascular disease?

Population

127,536 men and women free of diabetes, cardiovascular disease, and cancer at baseline, followed for 24 to 30 years.

Exposure

Replacing 5% of energy intake from saturated fats with equivalent energy intake from either polyunsaturated fatty acids (PUFAs), monounsaturated fats (MUFAs), or carbohydrates from whole grains.

Comparator

Dietary saturated fats or carbohydrates from refined starches/added sugars.

Outcome

Incident cases of coronary heart disease (CHD) over 24 to 30 years of follow-up.hard clinical

Main Result

Hazard Ratio: 0.75 (95% CI 0.67–0.84)

p-value: p=< 0.0001

Replacing dietary saturated fats with unsaturated fats (especially PUFAs) or high-quality carbohydrates from whole grains significantly reduces the risk of incident coronary heart disease.

Cite This Study

Li et al. (2015) conducted a cohort in Healthy adults (free of diabetes, cardiovascular disease, and cancer) (n=127,536). Polyunsaturated fatty acids (PUFAs) vs. Saturated fats was evaluated on Incident cases of coronary heart disease (CHD) (HR 0.75, 95% CI 0.67 to 0.84, p=< 0.0001). Replacing 5% of energy intake from saturated fats with polyunsaturated fatty acids was associated with a lower risk of coronary heart disease (HR 0.75; 95% CI 0.67-0.84; p<0.0001).

synapsesocial.com/papers/6a41e432d8bc5ceb756acc0b https://doi.org/10.1016/j.jacc.2015.07.055

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Implication

Replacing dietary saturated fats with unsaturated fats (especially PUFAs) or high-quality carbohydrates from whole grains significantly reduces the risk of incident coronary heart disease.

Saturated Fats Compared With Unsaturated Fats and Sources of Carbohydrates in Relation to Risk of Coronary Heart Disease

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Cite This Study

Saturated Fats Compared With Unsaturated Fats and Sources of Carbohydrates in Relation to Risk of Coronary Heart Disease

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Cite This Study

Also Consider

Also Consider