Ferrous Sulfate vs Iron Glycinate: Which Iron Supplement Wins
Ferrous Sulfate is a classic iron salt; Iron Glycinate is iron bound to the amino acid glycine. Both deliver iron, but their forms and absorption paths differ.
People swap the names because both come in little red bottles and fight tiredness. One feels harsher on the stomach, the other gentler, so shoppers wonder which label to grab for the same “energy boost” promise.
Key Differences
Ferrous Sulfate dissolves into free iron ions that can irritate the gut. Iron Glycinate keeps iron attached to glycine, letting it slip through cell membranes more smoothly and often with fewer tummy complaints.
Which One Should You Choose?
If you tolerate standard iron well and want a budget option, Ferrous Sulfate works. If you get nausea or constipation, Iron Glycinate may feel kinder. Always let your doctor decide for your situation.
Can I take either without food?
Ferrous Sulfate absorbs better on an empty stomach, but many people pair it with food to avoid upset. Iron Glycinate is usually fine with meals.
Will either stain my teeth?
Liquid forms of any iron can cause dark marks on teeth; rinse or brush after use to reduce the risk.