Can You Take Iron and Manganese Together?
Usually, yes. Iron status can affect manganese absorption, but current evidence does not establish a required spacing interval.
The short answer
Iron and manganese can usually be taken together, although a person's iron status can change how much manganese is absorbed.
Why it happens
Dietary iron intake and ferritin status are inversely associated with manganese absorption, possibly because iron and manganese share part of an intestinal transport pathway.
What to do
Typical multivitamin doses can generally be taken together. If you are treating iron deficiency, follow your iron instructions and do not add high-dose manganese on your own.
Who this matters most for
This mainly matters for people managing iron deficiency or taking iron supplements regularly, since their changing iron status can shift how much manganese they absorb from the same intake. It also deserves more attention for people with chronic high manganese exposure or chronic liver disease, where the usual balance between iron and manganese absorption is less predictable.
What the evidence actually showed
The evidence here is about a biological relationship, not a required timing rule. Dietary iron intake and ferritin status move inversely with manganese absorption, and the proposed reason is that iron and manganese share part of an intestinal transport pathway — when iron status is low, more manganese may get absorbed through that shared route. This explains why iron deficiency specifically is flagged as a situation where manganese absorption may increase, but it does not translate into a fixed number of hours to separate the two nutrients for typical multivitamin doses.
When this advice applies
Iron deficiency may increase manganese absorption. Extra caution is warranted with chronic high manganese exposure or chronic liver disease.
Common questions
Does taking iron affect how much manganese I absorb?
It can. Dietary iron intake and ferritin status are inversely associated with manganese absorption, meaning higher iron status tends to go along with lower manganese absorption, and vice versa. This is likely because iron and manganese share part of an intestinal transport pathway.
Do I need to space out iron and manganese supplements?
Typical multivitamin doses can generally be taken together, and current evidence does not establish a required spacing interval. If you are treating iron deficiency, follow your iron instructions rather than trying to build a gap around manganese.
Is it safe to add extra manganese on my own while treating iron deficiency?
No, this is not recommended. Since iron status and manganese absorption are linked, and iron deficiency in particular may increase manganese absorption, adding high-dose manganese on your own while correcting iron deficiency is not something to do without guidance.
References
- Manganese — Health Professional Fact SheetNIH Office of Dietary Supplements · 2021
Updated July 31, 2026 · How to use this guidance