A complete safety, timing, and dosage guide for combining Chromium with Iron (Ferrous Sulfate, Ferrous Bisglycinate) — including how the two supplements interact, the best time of day to take each, and which populations should be careful.
Yes, you can take iron and chromium together safely. There is no significant interaction between iron (ferrous sulfate or ferrous bisglycinate) and chromium.
Iron (Ferrous Sulfate, Ferrous Bisglycinate) and Chromium together are safe for most adults. They do not interfere with each other's absorption or function in the body. You can take both daily without worrying about negative interactions.
Iron is absorbed primarily in the duodenum through divalent metal transporter 1 (DMT1), while chromium is absorbed via a separate, less well-defined pathway and is transported in the blood bound to transferrin. Because their absorptive routes differ, they do not directly compete for intestinal uptake at typical supplement doses. Chromium does bind to transferrin in the bloodstream, but at nutritional doses it has not been shown to meaningfully displace iron or affect iron status. Iron needs an acidic stomach environment for optimal absorption, whereas chromium is more readily absorbed with a meal. These different absorption conditions mean you can take both at the same time without compromising either.
Take iron and chromium at the same meal if you're using ferrous bisglycinate. If you're using ferrous sulfate, take it on an empty stomach with a glass of orange juice, and take chromium with breakfast or lunch. There's no need to separate iron and chromium by hours — taking them together is safe. If you prefer, you can take iron in the morning and chromium at lunch, just to reduce any chance of stomach upset. Always follow the dosage on the label and check with your pharmacist about drug interactions.
Ferrous bisglycinate is better absorbed and less likely to cause nausea than ferrous sulfate, and it can be taken with or without food. Ferrous sulfate is best absorbed on an empty stomach but may cause GI upset. Chromium picolinate is the best-absorbed form of chromium and is the most common in supplements; chromium polynicotinate is also available, while chromium chloride is poorly absorbed. The form of iron or chromium you choose does not change the lack of interaction between them.
Iron and chromium are commonly included in complete multivitamin-mineral formulas, and chromium is often added to blood-sugar management supplements alongside iron and B vitamins. They also appear in some energy support stacks.
Yes, you can take iron and chromium at the same time. They do not compete for absorption, and taking them together is considered safe. If you experience stomach upset, try taking them with a meal.
Yes, it is safe for most people to combine iron and chromium every day when following the recommended dosages. Avoid exceeding 45 mg of elemental iron and 1000 mcg of chromium daily without medical supervision.
You don't need to wait at all. Iron and chromium can be taken at the same time. If you prefer, a 1-2 hour gap works just as well, but it's not necessary.
No, they do not meaningfully compete for absorption. Iron is absorbed through DMT1 in the intestine, while chromium follows a separate pathway. At typical supplement doses, there is no significant interference.
People with iron overload conditions such as hemochromatosis should avoid iron supplements. People with diabetes should consult their doctor before taking chromium, as it may alter blood sugar levels.
I recommend taking chromium with a meal to reduce nausea. For iron, ferrous bisglycinate can be taken with or without food, while ferrous sulfate is best absorbed on an empty stomach — but it's fine to take with food if it upsets your stomach.
Reviewed by Caroline M. on April 8, 2026 for accuracy against the sources listed above. This page is educational and is not a substitute for professional medical advice.
The matrix has 86 supplements and 7310 pairwise interactions. Click any cell to see the full breakdown.