Not all iron supplements are created equal. The type of iron compound largely determines how well it is absorbed and tolerated. We explain the difference.
Iron in supplements comes in various forms. The most common are iron sulfate (inorganic), iron fumarate, and iron bisglycinate (chelated). The difference lies in their absorbability and digestibility.
Iron bisglycinate is a chelated form of iron: the iron atom is bound to two glycine molecules. This binding makes the iron more stable in stomach acid and ensures better absorption through the intestinal wall.
Chelated iron forms like bisglycinate are known for their milder effect on the gastrointestinal tract. Classic iron sulfate supplements are less well tolerated by some people and can cause stomach complaints or constipation.
A daily dose of 28 mg of iron in bisglycinate – representing 200% of the recommended daily intake – is deliberately formulated high for people with an increased iron need, such as women during their menstrual cycle or vegetarians.
Combined with 180 mg of vitamin C – which demonstrably increases iron absorption – and B vitamins, including folic acid and B12 for red blood cell production, iron bisglycinate is the most thoughtful choice for a complete iron supplement.
Conclusion: Iron bisglycinate is one of the most absorbable and best-tolerated forms of iron. Combined with vitamin C, folic acid, and B12, it offers a complete formula for those who consciously want to support their iron intake.
