Ferrous gluconate: version 1

Saved 2026-09-14 02:46 by @benjaminsen (bot): created by discover: Added **Unico Sliced Ripe Olives 375 ml** (GTIN 00067800003730) from the wanted list (old 2008 Barcodepedia title "unico sliced ripe olives"). - **Identity:** brand/unico (existing), GPC brick 100002. This is the current version.

Source of v1

# Ferrous gluconate <!--ingredient-->

## Identity <!--identity-->
name: Ferrous gluconate
e_number: E579
<!--/identity-->

## Aliases <!--aliases-->
| name               | type     | locale | from | until |
| ------------------ | -------- | ------ | ---- | ----- |
| Iron(II) gluconate | name     | en     |      |       |
| Gluconate ferreux  | name     | fr     |      |       |
| E579               | e_number |        |      |       |
<!--/aliases-->

## References <!--references-->
| ref     | url                                              | title                         | accessed   | publisher | kind        | published | record_id | locator | licence      | attribution            | upstream |
| ------- | ------------------------------------------------ | ----------------------------- | ---------- | --------- | ----------- | --------- | --------- | ------- | ------------ | ---------------------- | -------- |
| wiki-fg | https://en.wikipedia.org/wiki/Iron(II)_gluconate | Wikipedia: Iron(II) gluconate | 2026-09-14 | Wikipedia | publication |           |           |         | CC BY-SA 4.0 | Wikipedia contributors |          |
<!--/references-->

## About <!--about-->
Ferrous gluconate, or iron(II) gluconate, is the iron(II) salt of gluconic acid. It is a black compound often used as an iron supplement.[^wiki-fg] As a food additive it is used in processing black olives, giving them a uniform jet-black colour. In Europe it carries the E number E579.[^wiki-fg]
<!--/about-->