Iron vs Zinc for energy
Short answer: For energy, more users report improvement with Iron — 88% of 49 reports, versus 74% of 57 for Zinc.
Iron has 243 meta-analyses and 693 randomized trials on PubMed; Zinc has 220 and 555.
Based on 252 reports about Iron and 1,594 about Zinc. Not medical advice.
| Iron Supplement | Zinc Supplement | |
|---|---|---|
| Users say it helped | 69%helped88 reports · medium confidence | 59%helped510 reports · high confidence |
| Verdict | Mostly positive | Mixed |
| Research | AResearch: Strong | AResearch: Strong |
| Meta-analyses / RCTs | 243 / 693 | 220 / 555 |
| Mainly used for | ||
| Libido % reporting improvement | — | 90% (120) |
| Energy % reporting improvement | 88% (49) | 74% (57) |
| Hormones % reporting improvement | 100% (2) | 88% (94) |
| Sleep % reporting improvement | 100% (2) | 84% (76) |
| Mood % reporting improvement | 100% (8) | 81% (68) |
| Common side effects | stomach issues, liver accumulation, overdose toxicity, iron overload | nausea, stomach issues, vomiting, copper deficiency |
| Typical dose reported | 65 mg | 75 mg |
High-level ID female athletes experience a negative impact on endurance performance, which can be improved by supplementing with ∼100 mg of elemental iron per day or bi-daily. The decrements in other performance parameters characterizing a range of sports coincide with the severity of iron deficiency.
J Sport Health Sci, 2025 ↗“I supplemented with sublingual b12 and iron and daily electrolytes and I'm feeling much better.”
Acne patients have decreased serum zinc levels. Zinc is effective for the treatment of acne, particularly at decreasing the number of inflammatory papules, when used as monotherapy or as an adjunctive treatment.
Dermatol Ther, 2020 ↗“I had actual energy in the mornings for the first time I could remember.”
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Percentages come from first-hand user reports and are not clinical outcomes. Talk to a doctor before starting, stopping or combining anything. How we rate