The Study
Is Higher Consumption of Animal Flesh Foods Associated with Better Iron Status among Adults in Developed Countries? A Systematic Review
This study is a summary of 49 other studies that looked at whether eating more meat is linked to having more iron in the blood. Most of these studies just compared people who eat meat with those who don’t, so we can’t say for sure that meat *causes* better iron levels—only that they tend to go together. It’s like noticing that people who wear raincoats are often dry in the rain, but we can’t say the coat is why unless we test it properly.
Analysis score
Maximum 100 for a systematic review.
Where the score came from
Meat, especially red meat, has a special kind of iron that your body can use easily. This study looked at whether people who eat more meat have healthier iron levels.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 520 / 100
Quality score
Systematic reviews and meta-analyses of cohort studies. They sit above a single cohort study but below a single randomized trial, because the underlying evidence is still observational.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes, the result is important—especially for women who lose iron monthly and need more.
- 2Eating meat can help prevent tiredness, poor focus, and weakness from low iron.
- 3People who eat meat, especially 85 to 300 grams a day, tend to have higher iron levels.
- 4Premenopausal women who eat little meat are more likely to lack iron.
- 5Vegetarians often have lower iron stores even if they eat lots of iron-rich plants.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Nutrients
Year
2016
Authors
J. Jackson, Rebecca L. Williams, M. McEvoy, L. MacDonald-Wicks, Amanda J. Patterson
Related Content
Claims (6)
Eating meat, especially beef, gives your body all the nutrients it needs to survive and thrive — and your body can actually use them well.
If you're a premenopausal woman, especially an endurance athlete, eating more meat might help keep your iron levels up and reduce your chances of being low on iron.
Eating red meat every day might help your body store more iron than eating chicken or fish — one study says people who eat red meat daily have nearly a third more stored iron in their blood.
Eating more red meat—like beef or lamb—might help women of childbearing age in rich countries keep healthier iron levels, especially if they eat between a small steak and a large one every day.
Even if vegetarians eat more iron than meat-eaters, they might still be more likely to be low on iron because the kind of iron in plants isn't as easily absorbed by the body.
Eating meat affects iron levels more in women who still have periods than in men or women who don’t — probably because those women need more iron and lose it monthly.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.