Supplement stacks / Iron + Magnesium
Can You Take Iron with Magnesium?
Iron and magnesium can be taken together, but caution is advised due to potential interactions affecting absorption. Magnesium may interfere with iron absorption if taken simultaneously. It is recommended to space out the intake of these supplements to optimize their effectiveness.
Conservative, AI-assisted reading of publicly available medical sources (NIH, Mayo Clinic, WebMD, Examine.com). Informational only — it can't account for your medications, conditions, or genetics.
Magnesium may reduce the absorption of iron if taken together.
Generally safe for most individuals; caution in those with kidney disease.
Typical dosage: 200-400 mg daily
- Diarrhea (common)
- Nausea (less common)
- Abdominal cramping (less common)
- Avoid in individuals with kidney disease.
- Consult healthcare provider if taking other medications.
Generally safe when taken as directed; excess can lead to toxicity.
Typical dosage: Follow manufacturer guidelines
- Constipation (common)
- Nausea (common)
- Stomach upset (common)
- Consult healthcare provider if you have a history of iron overload.
- Monitor for gastrointestinal side effects.
Take magnesium in the evening and iron in the morning for optimal absorption.
- Consider taking magnesium and iron at different times of the day to enhance absorption.
- Consult a healthcare provider before starting any new supplement regimen.
Can you take Iron and Magnesium together?
Iron and magnesium can be taken together, but caution is advised due to potential interactions affecting absorption. Magnesium may interfere with iron absorption if taken simultaneously. It is recommended to space out the intake of these supplements to optimize their effectiveness.
How safe is the Iron and Magnesium combination?
Our analysis of publicly available medical sources scores this combination 7/10 (medium risk). This is an informational estimate, not medical advice — always confirm with a healthcare professional.
When should you take Iron and Magnesium?
Take magnesium in the evening and iron in the morning for optimal absorption.
What should you watch out for when combining Iron and Magnesium?
Consult a healthcare provider before starting any new supplement regimen.
Taking more than these two? Run your complete supplement list — plus any medications — through the live checker for a combined analysis.
Analyze my stackGenetics change how you process supplements like these. Upload raw 23andMe or Ancestry data for a personalized supplement report.
See the DNA reportNot medical advice
Analysis generated July 14, 2026 · Sources include NIH, Mayo Clinic, WebMD, and Examine.com · How our analysis works