Ingredient

Ferrous Sulfate

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What is Ferrous Sulfate?

Ferrous sulfate is an iron salt used primarily as an iron supplement. It is typically produced by reacting iron with sulfuric acid, resulting in a crystalline salt that can be ground into a powder or formulated into a solution.

Ferrous sulfate is commonly added to infant formulas and baby foods to prevent and treat iron deficiency anemia, which is essential for proper growth and development. While it's effective in correcting iron deficiency, it can sometimes cause gastrointestinal side effects like constipation or upset stomach.

When you see ferrous sulfate on a label, it signifies that the product is fortified with iron. This helps support the body's production of red blood cells and oxygen transportation.

Commonly found in: Baby Formula, Baby Food, Dietary Supplements, Fortified Cereals, Animal Feed

What to watch

  • May cause gastrointestinal issues such as constipation and abdominal discomfort.
  • Excessive intake can lead to iron overload, which is harmful and requires medical attention.

Benefits

  • Essential for preventing and treating iron deficiency anemia.
  • Supports red blood cell production and oxygen transport.
FDA

Ferrous sulfate is approved by the FDA as a safe and effective source of dietary iron.

Research

Studies confirm its efficacy in treating anemia, but some report gastrointestinal side effects in certain populations.

Vegan

Ferrous sulfate is a mineral and is generally considered vegan-friendly, as it is not derived from animal sources.

Sources: Iron Supplements: Precautions and Side Effects

Scout's take

Inorganic iron form; may cause GI distress in infants; less bioavailable than organic iron forms

More from Scout's analyses

Synthetic iron fortification — poorly bioavailable form that can irritate infant gut.

from the analysis of Beech-Nut Rice Single Grain Baby Cereal Stage 1

Inorganic iron; may cause GI distress in infants

from the analysis of Nutriben Inicio Baby Formula

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