Study analysis · Circulation · 2025
Women who eat a lot of red meat may face nearly a 40% higher risk of dying from heart disease — but men face far less risk, a new study finds.
Eating a lot of red or processed meat is linked to a higher chance of dying from heart disease, especially for women, and swapping it for nuts or beans can help lower that risk.
Overview
What the study found
The study in plain English — the bottom line, every takeaway we extracted, and what to do with them.
In simple terms
This study looked at what people eat and whether they later got heart disease, but it didn’t change anyone’s diet on purpose. It can show that eating more meat is linked to higher heart disease risk, but it can’t prove that meat caused the disease because other lifestyle factors might be involved.
What’s the bottom line?
Eating a lot of red meat or processed meat is linked to a higher chance of dying from heart disease, especially for women. Eating nuts, seeds, soy, or dairy instead can lower that risk.
How strong is this study?
The study followed a huge number of people for many years, which makes it strong at finding patterns. But since it relied on people remembering what they ate and didn’t randomly assign diets, we can’t be totally sure the results are due to meat alone — that’s why it’s good but not the strongest kind of proof.
0 / 100
- COI disclosureconflicts of interest not disclosed
- Data availabilitydata not shared
- Code availabilitycode not shared
38 / 100
- Randomizationrandomization unclear
- Blindingblinding unclear
- Control groupno control group
- Sample size (n=1764019)+20/20
- Follow-up+10/10
100 / 100
77 / 100
- P-values+15/15
- Effect size+20/20
- Confidence intervals+15/15
- Pre-registrationnot pre-registered
Each component is scored out of 100 and then capped by the study design — a case series cannot reach the ceiling a randomised trial can, however well it is reported.
Where it sits
RCT reviewsReviews of RCTs (Meta-analyses)
Max 100Randomized TrialsRandomized Trials
Max 90Reviews of Cohort StudiesReviews of Cohort Studies
Max 85Cohort StudiesCohort Studies
Max 72Reviews of Case-Control StudiesReviews of Case-Control Studies
Max 63Case-Control StudiesCase-Control Studies
Max 58Cross-Sectional & Case SeriesCross-Sectional & Case Series
Max 50Expert OpinionExpert Opinion
Max 552 / 100
Probability of being correct
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
This design cannot establish causation — the findings describe an association, not a cause. This is an observational cohort study based on pooled data from 25 prospective cohorts. While it shows associations, it cannot prove causation due to potential unmeasured confounding factors. Randomization and blinding were not reported, so causal inference is not supported.
Key takeaways
- 01
Women who eat ≥125g of unprocessed red meat daily have a 34% higher risk of fatal heart disease; men have a 6% higher risk.
- 02
For processed meat (≥50g/day), women have a 39% higher risk, men a 13% higher risk.
- 03
Replacing meat with plant proteins lowers risk.
- 04
Yes, the results suggest that changing what you eat—especially replacing meat with plant-based foods—can meaningfully reduce heart disease risk, particularly for women.
Surprising findings
- The increased risk of fatal heart disease from red meat is much stronger in women than in men, despite similar intake levels.Most nutrition studies assume similar effects across sexes, but this large analysis shows a dramatic difference — women face up to 39% higher risk while men face only 6–13%, which is not commonly known.
Practical takeaways
Replace one daily serving of red or processed meat with plant-based proteins like lentils, tofu, or nuts to lower heart disease risk.
Dietary data was self-reported at baseline only, and full methodology cannot be verified without the full paper.
low confidenceWomen may benefit more from reducing red meat intake than men, based on the observed risk differences.
The reason for the sex difference is not explained in the abstract and could be due to biological, hormonal, or behavioral factors not accounted for.
low confidenceWhy this study matters
Red Meat Risk Isn’t Equal: Women at Higher Risk
In this study, women who ate ≥125g of unprocessed red meat daily had a 34% higher risk of fatal heart disease (HR: 1.34), while men had only a 6% increase (HR: 1.06). For processed meat (≥50g/day), women faced a 39% higher risk and men a 13% higher risk.
This suggests that dietary advice may need to be sex-specific — what’s risky for women might be less so for men, which could change how we think about personalized nutrition.
Processed Meat Is Worse Than Red Meat
The study found a stronger link between processed meat and fatal heart disease than unprocessed red meat. For women, processed meat was tied to a 39% higher risk (HR: 1.39) vs. 34% for unprocessed meat (HR: 1.34).
Many people think all red meat is equally bad, but this shows processed meats like bacon and sausages may be especially harmful, likely due to preservatives, salt, or cooking methods.
Swap Meat for Nuts, Seeds, or Soy — Risk Goes Down
Replacing red or processed meat with plant-based proteins like nuts, seeds, soy, or dairy was linked to a lower risk of fatal heart disease. The benefit was seen in both men and women, especially when substituting for processed meat.
You don’t have to go fully vegan — just swapping one meal a day could make a real difference in long-term heart health.
Want the whole report?
Detailed mode opens the full scientific breakdown — every score component, the methodology, conflicts of interest, the evidence analysis behind each claim, and the raw study data.
Overview
What the study found
The study in plain English — the bottom line, every takeaway we extracted, and what to do with them.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Eating a lot of red meat or processed meat is linked to a higher chance of dying from heart disease, especially for women. Eating nuts, seeds, soy, or dairy instead can lower that risk.
Research results
Women who eat ≥125g of unprocessed red meat daily have a 34% higher risk of fatal heart disease; men have a 6% higher risk. For processed meat (≥50g/day), women have a 39% higher risk, men a 13% higher risk. Replacing meat with plant proteins lowers risk.
What this means - more context
Yes, the results suggest that changing what you eat—especially replacing meat with plant-based foods—can meaningfully reduce heart disease risk, particularly for women.
The study aimed to evaluate the associations between unprocessed red meat and processed meat intake and the risk of fatal coronary heart disease (CHD), and to assess the health effects of replacing these meats with alternative protein sources.
In a pooled analysis of 25 prospective cohorts, higher intakes of both unprocessed red meat and processed meat were associated with an increased risk of fatal CHD, with stronger associations observed in women than in men. Substituting these meats with plant-based proteins such as nuts, seeds, soy, or dairy was associated with lower risk.
Methods Used
The study conducted a pooled analysis of 25 international prospective cohorts with 1,090,325 women and 673,694 men. Dietary intake was assessed at baseline using food frequency questionnaires. Cohort- and sex-specific hazard ratios were calculated using proportional hazards regression, and estimates were pooled using random-effects models. Isocaloric substitution analyses compared meat intake with alternative protein sources.
Main Finding
Comparing extreme intake categories, unprocessed red meat (≥125 vs. <10 g/day) was associated with a 34% higher risk of fatal CHD in women (HR: 1.34, 95% CI: 1.15–1.55) and a 6% higher risk in men (HR: 1.06, 95% CI: 0.99–1.17). For processed meat (≥50 vs. <2 g/day), the risk was 39% higher in women (HR: 1.39, 95% CI: 1.22–1.59) and 13% higher in men (HR: 1.13, 95% CI: 1.03–1.25). Replacing either meat type with plant-based proteins was associated with lower risk.
Confidence Level
Limited - based on abstract only, full methodology not available
Study Flags
Red Flags
- •Full text not available - methodology details cannot be verified
- •Sex differences observed but mechanism not explained in abstract
- •Dietary data based on self-reported food frequency questionnaires at baseline only
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Surprising Findings
The increased risk of fatal heart disease from red meat is much stronger in women than in men, despite similar intake levels.
Most nutrition studies assume similar effects across sexes, but this large analysis shows a dramatic difference — women face up to 39% higher risk while men face only 6–13%, which is not commonly known.
Practical Takeaways
Replace one daily serving of red or processed meat with plant-based proteins like lentils, tofu, or nuts to lower heart disease risk.
RCT reviewsReviews of RCTs (Meta-analyses)
Max 100Randomized TrialsRandomized Trials
Max 90Reviews of Cohort StudiesReviews of Cohort Studies
Max 85Cohort StudiesCohort Studies
Max 72Reviews of Case-Control StudiesReviews of Case-Control Studies
Max 63Case-Control StudiesCase-Control Studies
Max 58Cross-Sectional & Case SeriesCross-Sectional & Case Series
Max 50Expert OpinionExpert Opinion
Max 552 / 100
Probability of being correct
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Human Cohort Study
Subject
Moderate probability
on the GRADE evidence scale
This study looked at what people eat and whether they later got heart disease, but it didn’t change anyone’s diet on purpose. It can show that eating more meat is linked to higher heart disease risk, but it can’t prove that meat caused the disease because other lifestyle factors might be involved.
Strengths
- Large sample size (over 1.7 million participants)
- Pooled analysis increases statistical power
- Multivariable adjustment for key confounders (BMI, lifestyle, medical factors)
Weaknesses
- Full methodology not available - based on abstract only
- Dietary intake assessed by food frequency questionnaire (self-reported, prone to bias)
- Randomization status unknown - not an RCT
Methodology
Evidence Keywords
Statistical Reporting
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Eating a lot of red meat or processed meat is linked to a higher chance of dying from heart disease, especially for women. Eating nuts, seeds, soy, or dairy instead can lower that risk.
Research results
Women who eat ≥125g of unprocessed red meat daily have a 34% higher risk of fatal heart disease; men have a 6% higher risk. For processed meat (≥50g/day), women have a 39% higher risk, men a 13% higher risk. Replacing meat with plant proteins lowers risk.
What this means - more context
Yes, the results suggest that changing what you eat—especially replacing meat with plant-based foods—can meaningfully reduce heart disease risk, particularly for women.
The study aimed to evaluate the associations between unprocessed red meat and processed meat intake and the risk of fatal coronary heart disease (CHD), and to assess the health effects of replacing these meats with alternative protein sources.
In a pooled analysis of 25 prospective cohorts, higher intakes of both unprocessed red meat and processed meat were associated with an increased risk of fatal CHD, with stronger associations observed in women than in men. Substituting these meats with plant-based proteins such as nuts, seeds, soy, or dairy was associated with lower risk.
Methods Used
The study conducted a pooled analysis of 25 international prospective cohorts with 1,090,325 women and 673,694 men. Dietary intake was assessed at baseline using food frequency questionnaires. Cohort- and sex-specific hazard ratios were calculated using proportional hazards regression, and estimates were pooled using random-effects models. Isocaloric substitution analyses compared meat intake with alternative protein sources.
Main Finding
Comparing extreme intake categories, unprocessed red meat (≥125 vs. <10 g/day) was associated with a 34% higher risk of fatal CHD in women (HR: 1.34, 95% CI: 1.15–1.55) and a 6% higher risk in men (HR: 1.06, 95% CI: 0.99–1.17). For processed meat (≥50 vs. <2 g/day), the risk was 39% higher in women (HR: 1.39, 95% CI: 1.22–1.59) and 13% higher in men (HR: 1.13, 95% CI: 1.03–1.25). Replacing either meat type with plant-based proteins was associated with lower risk.
Confidence Level
Limited - based on abstract only, full methodology not available
Study Flags
Red Flags
- •Full text not available - methodology details cannot be verified
- •Sex differences observed but mechanism not explained in abstract
- •Dietary data based on self-reported food frequency questionnaires at baseline only
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Surprising Findings
The increased risk of fatal heart disease from red meat is much stronger in women than in men, despite similar intake levels.
Most nutrition studies assume similar effects across sexes, but this large analysis shows a dramatic difference — women face up to 39% higher risk while men face only 6–13%, which is not commonly known.
Practical Takeaways
Replace one daily serving of red or processed meat with plant-based proteins like lentils, tofu, or nuts to lower heart disease risk.
RCT reviewsReviews of RCTs (Meta-analyses)
Max 100Randomized TrialsRandomized Trials
Max 90Reviews of Cohort StudiesReviews of Cohort Studies
Max 85Cohort StudiesCohort Studies
Max 72Reviews of Case-Control StudiesReviews of Case-Control Studies
Max 63Case-Control StudiesCase-Control Studies
Max 58Cross-Sectional & Case SeriesCross-Sectional & Case Series
Max 50Expert OpinionExpert Opinion
Max 552 / 100
Probability of being correct
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Human Cohort Study
Subject
Moderate probability
on the GRADE evidence scale
This study looked at what people eat and whether they later got heart disease, but it didn’t change anyone’s diet on purpose. It can show that eating more meat is linked to higher heart disease risk, but it can’t prove that meat caused the disease because other lifestyle factors might be involved.
Strengths
- Large sample size (over 1.7 million participants)
- Pooled analysis increases statistical power
- Multivariable adjustment for key confounders (BMI, lifestyle, medical factors)
Weaknesses
- Full methodology not available - based on abstract only
- Dietary intake assessed by food frequency questionnaire (self-reported, prone to bias)
- Randomization status unknown - not an RCT
Methodology
Evidence Keywords
Statistical Reporting
Scoring
How strong is this study?
The study followed a huge number of people for many years, which makes it strong at finding patterns. But since it relied on people remembering what they ate and didn’t randomly assign diets, we can’t be totally sure the results are due to meat alone — that’s why it’s good but not the strongest kind of proof.
0 / 100
- COI disclosureconflicts of interest not disclosed
- Data availabilitydata not shared
- Code availabilitycode not shared
38 / 100
- Randomizationrandomization unclear
- Blindingblinding unclear
- Control groupno control group
- Sample size (n=1764019)+20/20
- Follow-up+10/10
100 / 100
77 / 100
- P-values+15/15
- Effect size+20/20
- Confidence intervals+15/15
- Pre-registrationnot pre-registered
Each component is scored out of 100 and then capped by the study design — a case series cannot reach the ceiling a randomised trial can, however well it is reported.
Where it sits
RCT reviewsReviews of RCTs (Meta-analyses)
Max 100Randomized TrialsRandomized Trials
Max 90Reviews of Cohort StudiesReviews of Cohort Studies
Max 85Cohort StudiesCohort Studies
Max 72Reviews of Case-Control StudiesReviews of Case-Control Studies
Max 63Case-Control StudiesCase-Control Studies
Max 58Cross-Sectional & Case SeriesCross-Sectional & Case Series
Max 50Expert OpinionExpert Opinion
Max 552 / 100
Probability of being correct
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
This design cannot establish causation — the findings describe an association, not a cause. This is an observational cohort study based on pooled data from 25 prospective cohorts. While it shows associations, it cannot prove causation due to potential unmeasured confounding factors. Randomization and blinding were not reported, so causal inference is not supported.
Standing
Who’s using this study?
The videos and claims on this site that lean on this study, and the researchers who wrote it.
1 video from Thomas DeLauer cite this study, drawing 1 claim from it.
- Conflicting evidence
Evidence points in both directions — no clear conclusion yet.
Evidence