Calcium and Iron together
Checked on Calcium and Iron Bisglycinate — the best-absorbed forms people actually buy. Other forms of the same two behave the same way here: the interaction belongs to the mineral, not to the carrier.
Separate by 2-4 hours to avoid the interaction below.
Verdict
Timing plan
Separate themThese two compete on absorption. Splitting the day keeps both effective.
What clashes
Iron Bisglycinate → Calcium
Competition for intestinal transporters · majorWhat each one is for
Two different jobs — that is why the pairing question comes up at allCalcium — bone health & muscle function.
Usual daily dose 1,000-1,200 mg, taken divided doses with meals. The ceiling is 2500 mg a day (NIH ODS). It is named as the suspect product in 569 FDA reports. Evidence grade A.
Iron Bisglycinate — gentle high-absorption iron.
Usual daily dose 18-65 mg elemental, taken with vitamin c between meals. The ceiling is 45 mg a day (NIH ODS). It is named as the suspect product in 340 FDA reports. Evidence grade A.
Side by side
| Calcium | Iron Bisglycinate | |
|---|---|---|
| Absorption score | 30/100 | 90/100 |
| Elemental mineral | 100% | 27.4% |
| Cost per 100 mg delivered | $0.2 | $9.77 |
| Safety rating | 8/10 | 7/10 |
| Cost per month | $20 | $30 |
| Daily dose | 1,000-1,200 mg | 18-65 mg elemental |
| Best timing | Divided doses with meals | With vitamin c between meals |
| 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 and Iron Bisglycinate 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?
In this pairing the issue is: Inhibits iron absorption Separate them by two to four hours.
When should you take Calcium and Iron Bisglycinate?
Calcium: Divided doses with meals. Iron Bisglycinate: With vitamin c between meals. Keep at least a two-hour gap between them.