The Study
Effect of iron dose in maternal multiple micronutrient supplement on perceived side effects, adherence, acceptability and preferences: protocol for a randomised crossover trial
This study asked pregnant women to try three different pill types and say which they liked best and which made them feel sick. It doesn't prove that one pill makes babies healthier, but it does show which pill women are more likely to keep taking because it feels better.
Analysis score
Maximum 45 for a randomized controlled trial.
Where the score came from
Doctors give pregnant women pills with iron to help them stay healthy. Some pills have more iron, some have less. This study gave women all three kinds, one at a time, and asked how they felt.
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 545 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — lower iron doses (30 mg) work just as well as higher ones (60 mg) in terms of how women feel and whether they keep taking them, which could make public health programs easier to run.
- 2Women took 30 mg, 45 mg, and 60 mg iron pills.
- 3They felt just as okay with the 30 mg pills as the 60 mg ones — same number of side effects, same adherence, same preference.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
BMJ Open
Year
2026
Authors
Christopher R Sudfeld, A. Muhihi, A. Sylvetsky, Emmy Metta, Victoria S. Brownlee, Erin Oakley, M. Bakari, W. Fawzi, Shabani Kinyogoli, Jordan R. Kuiper, Sabina Mugusi, Qing Pan, Mary M. Sando, B. Wylie, H. Masanja, Emily R. Smith, A. Pembe
Related Content
Claims (4)
Taking dietary supplements restores essential nutrient levels in people who eat modern diets, and this restoration restores normal physiological function.
Pregnant women in Tanzania cannot tell the difference between iron supplements with 30 mg, 45 mg, or 60 mg of iron by how they look, feel, or smell, or by any immediate physical reaction.
In pregnant women in Tanzania, taking daily micronutrient pills with 30 mg, 45 mg, or 60 mg of iron results in the same rate of pill-taking, as measured by counting pills.
Among pregnant women in Tanzania, preference for a daily supplement with 30 mg of iron is no higher than for supplements with 45 mg or 60 mg of iron when women have experienced all three options.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.