Can you take Caffeine and Iron (ferrous bisglycinate) together?
Yes, with care — this combination needs a precaution.
Caffeine and Iron (ferrous bisglycinate) can be taken together, but the combination needs a precaution.
Why these two interact
Polyphenols in coffee/tea inhibit non-heme iron absorption by up to 60%.
What to do about it
Take iron away from coffee and tea by at least 2 hours.
Timing
Separate Caffeine and Iron (ferrous bisglycinate) by at least 2 hours. Taking them in the same window is what causes the issue, not taking them on the same day.
The two items in this pair
Iron (ferrous bisglycinate)
- Category:
- mineral
- Typical timing:
- morning
- With food:
- either
Check your whole routine, not just this pair
One pair rarely tells the whole story. DoseRoutine checks every combination in your stack at once — supplements, TRT, peptides, GLP-1s and prescriptions — and schedules the doses so timing conflicts like this one are handled automatically.
Frequently asked
Related combinations
- Amantadine and CaffeineCaution
- Amphetamine Salts and CaffeineCaution
- Caffeine and Creatine MonohydrateNote
- Caffeine and L-TheanineSynergy
- Caffeine and LisdexamfetamineCaution
- Caffeine and MethylphenidateCaution
- Calcium and Iron (ferrous bisglycinate)Caution
- Iron (ferrous bisglycinate) and LevothyroxineCaution
Educational information only, not medical advice. DoseRoutine does not diagnose or treat. Talk to your prescriber before starting, stopping or combining anything — especially if you take prescription medication or are pregnant or breastfeeding.