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Head-to-head evidence comparison — which supplement is right for you?
Clomiphene (Clomid) vs Iron: Iron has the stronger overall evidence (9 vs 4.8/10); they're alternatives for fertility support — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Iron wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Likely helps
11 of 15 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Clomiphene (Clomid) and Iron have evidence — compare verdict strength side-by-side.
Off-label (male) / approved (female) — clinician-directed. For female ovulation induction the approved regimen is 50 mg once daily for 5 days starting early in the cycle, titrated up to 100-150 mg if needed. For off-label male hypogonadism, observational studies used roughly 25-50 mg daily or every other day (25 mg/day is the most common starting dose), titrated to testosterone and LH/FSH response. There is no FDA-approved male dose.
any
Clomiphene citrate tablets (racemic — approved for women; off-label in men)
18-45mg elemental iron for deficiency (varies by severity)
On empty stomach if tolerated, Away from tea, coffee, dairy
Ferrous bisglycinate (gentle, well-absorbed) or iron protein succinylate
Per cycle (5-10 day course)
Weeks to a few months
Within 3-6 months
N/A
2-4 weeks
4-8 weeks
4-12 weeks
Clomiphene citrate for men with hypogonadism: a systematic review and meta-analysis.
Andrology (2022) · Meta analysis · n=1642
Systematic review and meta-analysis of clomiphene citrate for male hypogonadism — 19 studies (4 RCTs, 15 observational), 1,642 patients; 17 studies (1,279 patients) in the meta-analysis
Letrozole versus clomiphene for infertility in the polycystic ovary syndrome.
N Engl J Med (2014) · Rct · n=750
Double-blind, multicenter RCT (NCT00719186) of 750 women with PCOS randomized 1:1 to letrozole vs clomiphene for up to five cycles; primary outcome live birth
Clomiphene and other antioestrogens for ovulation induction in polycystic ovarian syndrome.
Cochrane Database Syst Rev (2016) · Systematic review
Cochrane systematic review of clomiphene and other antioestrogens for ovulation induction in anovulatory PCOS subfertility
Daily oral iron supplementation during pregnancy
The Cochrane database of systematic reviews (2024) · Meta analysis · n=48971
There is probably little to no difference in maternal death (2 versus 4 events, RR 0.57, 95% CI 0.12 to 2.69; 3 trials, 14,060 women; moderate-certainty evidence).
The Prevalence of Anemia among Pregnant Women in China: A Systematic Review and Meta-Analysis
Nutrients (2024) · Meta analysis · n=722
The results showed that the prevalence of anemia, ID, and IDA among pregnant women in China were 30.7% (95% CI: 26.6%, 34.7%), 45.6% (95% CI: 37.0%, 54.2%), and 17.3% (95% CI: 13.9%, 20.7%), respectively.
Treatment for women with postpartum iron deficiency anaemia
The Cochrane database of systematic reviews (2024) · Meta analysis · n=572
Intravenous iron versus oral iron supplementation The evidence is very uncertain about the effect of intravenous iron on mortality (risk ratio (RR) 2.95, 95% confidence interval (CI) 0.12 to 71.96; P = 0.51; I² = not applicable; 3 RCTs; 1 event; 572 women; very low-certainty evidence).
Based on meta-analyses showing hemoglobin improvements of 2.01-5.30 g/dL in iron deficient populations. Higher doses show diminishing returns with increased GI side effects. Effectiveness varies significantly by baseline iron status and form used.
AI-estimated from published studies. Interpret as directional guidance.
Iron has a higher evidence score (9/10 vs 4.8/10) and wins in 3 of 3 categories.
For fertility support, Iron has a higher relevance score (70 vs 64).
No known interactions between Clomiphene (Clomid) and Iron have been documented in our database. However, always consult a healthcare provider before combining supplements.
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The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.