Calcium Citrate + Iron Sulfate
Separate by 2-4 hours to avoid the interaction below.
0
compatibility
0
synergies
0
conflicts
Verdict
40
out of 100
Needs attention
Separate by 2-4 hours to avoid the interaction below.
Timing plan
Separate them
Calcium Citrate
Divided doses between meals
500-1200 mg
wait 2–4 hours
Iron Sulfate
Empty stomach if tolerated
65-200 mg
These two compete on absorption. Splitting the day keeps both effective.
What clashes
!
Calcium inhibits iron absorption
Calcium Citrate → Iron Sulfate
Competition for intestinal transporters · majorSide by side
| Calcium Citrate | Iron Sulfate | |
|---|---|---|
| Bioavailability | 90% | 20% |
| Safety rating | 7/10 | 6/10 |
| Cost per month | $20 | $8 |
| Daily dose | 500-1200 mg | 65-200 mg |
| Best timing | Divided doses between meals | Empty stomach if tolerated |
| Evidence level | A | A |
How this score was built
- Baseline for any untested pair: 70
- −30 — major clinical conflict
- = 40 out of 100
Where to buy
Buying both? Check the timing plan above so they do not cancel each other out.
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Common questions
Can you take Calcium Citrate and Iron Sulfate together?
Separate by 2-4 hours to avoid the interaction below. The pair scores 40 out of 100, based on 1 documented interaction records.
What should you not take with Calcium Citrate?
In this pairing the issue is: Calcium inhibits iron absorption Separate them by two to four hours.
When should you take Calcium Citrate and Iron Sulfate?
Calcium Citrate: Divided doses between meals. Iron Sulfate: Empty stomach if tolerated. Keep at least a two-hour gap between them.