The Claim
The type of diet consumed significantly alters iron bioaccessibility, with a basic diet (low calcium, high vitamin C) yielding the highest bioaccessibility (7.96%) and a standard diet (high calcium, low vitamin C, polyphenol-rich) yielding the lowest (4.63%) in the absence of supplementation.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
A diet low in calcium and high in vitamin C results in 7.96% iron bioaccessibility, while a diet high in calcium, low in vitamin C, and rich in polyphenols results in 4.63% iron bioaccessibility when no supplements are taken.
See the scientific wording
The type of diet consumed significantly alters iron bioaccessibility, with a basic diet (low calcium, high vitamin C) yielding the highest bioaccessibility (7.96%) and a standard diet (high calcium, low vitamin C, polyphenol-rich) yielding the lowest (4.63%) in the absence of supplementation.
Iron from food dissolves in stomach acid as a charged ion that can be absorbed, but certain foods block this by binding to iron and making it insoluble. Vitamin C keeps iron in a soluble form and prevents it from turning into a version the body cannot use. Calcium and plant compounds like tannins bind tightly to iron and trap it in a form that cannot be absorbed.
What the research says
1 studyThis study found that eating foods high in vitamin C and low in calcium (like oranges and spinach) helps your body release more iron from your food, while eating foods like coffee, tea, or dairy with iron makes less iron available. So yes, what you eat with your iron matters.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.