Last reviewed May 2026 · 1 min read
Is Ferrous Gluconate vegan?
Also known as: E579
E-number: E579
Vegan
Suitable for a vegan diet.
Yes — Produced from plant sugars and minerals.
01 · The basics
What is Ferrous Gluconate?
Used to color olives black.
02 · The source
Where it comes from
Produced from plant sugars and minerals. 100% vegan.
Frequently asked
FAQ
Are black olives dyed?
Often yes, with E579, which is a vegan iron salt.
Commonly found in
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Allura Red AC
A popular synthetic red food dye used to give foods and drinks a prominent red or pink color.
Tartrazine
A bright lemon-yellow synthetic food dye commonly used in processed foods, drinks, and medications.
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A synthetic blue dye used in foods, cosmetics, and dietary supplements to achieve a vibrant blue hue.
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