The Claim
Heme iron and preformed vitamin A (retinol) from animal sources exhibit significantly higher bioavailability compared to non-heme iron and beta-carotene from plant sources.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Your body absorbs iron and vitamin A from meat and animal products way better than the versions found in plants.
See the scientific wording
Heme iron and preformed vitamin A (retinol) from animal sources have significantly higher bioavailability than non-heme iron and beta-carotene from plant sources.
What the research says
1 studyStudy: Iron Absorption: Factors, Limitations, and Improvement Methods
The study shows that iron from animal sources is easier for your body to absorb than iron from plants, which supports part of the claim. It doesn’t talk about vitamin A from plants or animals, so we can’t say if that part is true based on this study.
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.