Supplement stacks / Calcium + Iron
Can You Take Calcium with Iron?
Calcium and Iron: one interaction flagged, scored 5/10 (medium risk). The count and score come from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice.
Safety at a glance
This score comes from an AI-written analysis of the pair. Our interaction rules check it and can only make it stricter, never milder. Informational only: it can't account for your medications, conditions, or genetics.
What the AI-written analysis says
Calcium and iron can interfere with each other's absorption when taken together. It is generally recommended to space out the intake of these supplements to optimize absorption and minimize potential interactions.
Known interactions
Calcium may inhibit the absorption of iron when taken simultaneously.
Calcium
From the AI-written analysis.
Calcium is generally safe when taken at recommended dosages. Excessive intake can lead to hypercalcemia and kidney stones.
Typical dosage: 1000-1300 mg daily depending on age and gender
- Constipation
- Bloating
- Gas
- Consult healthcare provider if you have kidney disease or hyperparathyroidism.
- Excessive calcium can interfere with the absorption of other minerals.
Iron
From the AI-written analysis.
Iron is safe at recommended dosages but can cause gastrointestinal upset and constipation. Overdose can lead to serious health issues.
Typical dosage: 8-18 mg daily depending on age, gender, and health status
- Nausea
- Constipation
- Stomach pain
- Consult healthcare provider if you have hemochromatosis or other iron overload conditions.
- Iron supplements can interact with certain medications.
Timing
Take calcium and iron supplements at least 2 hours apart to minimize interaction effects.
Recommendations
- Consider taking calcium and iron at different times of the day to enhance absorption.
Frequently asked questions
Can you take Calcium and Iron together?
Calcium and Iron: one interaction flagged, scored 5/10 (medium risk). The count and score come from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice.
What score does the Calcium and Iron combination get?
The Calcium and Iron combination is scored 5/10 (medium risk). The score comes from an AI-written analysis checked against our interaction rules, which can only make it stricter. Not medical advice. Always confirm with a healthcare professional.
When should you take Calcium and Iron?
Take calcium and iron supplements at least 2 hours apart to minimize interaction effects.
Check your full stack
Taking more than these two? Add everything you take, medicines included, to your list. We check each supplement on your list against the rest of it, and name anything we could not check. Free, and you don’t need an account.
Analyze my stackWhat your DNA adds
Some genes in a raw 23andMe or AncestryDNA file are linked to how the body handles nutrients. The DNA report says what yours are linked to and, where there is one, which blood test would tell you more.
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Not medical advice
AI-written analysis generated July 14, 2026, checked by our interaction rules · How our analysis works