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Is Gluconic acid, GDL and gluconates (E574–E579) Halal?

Yes — this one is Halal.

Halal

High confidence About this ruling

About this ruling

Evidence confidence
High means this page cites a primary regulator listing and a named Halal certifier listing, retrieved 16 August 2026. That describes the quality of the sources on this page—not a Halal certificate for the pack or outlet in your hand.
How we score High, Medium, and Low

Gluconic acid and glucono-delta-lactone are made by fermenting glucose.

Evidence at a glance

Named sources used for this page. Open the full Sources block for notes and citation numbers.

Source Type Retrieved
21 CFR § 184.1685 glucono-delta-lactone U.S. eCFR Regulatory / labelling
Regulation (EC) No 1333/2008 on food additives European Union Regulatory / labelling
European Commission — Food additives European Commission Regulatory / labelling
Codex GSFA online FAO / WHO Codex Regulatory / labelling
SANHA — E-numbers SANHA Certifier / jurisdiction
U.S. FDA — Food additives U.S. Food and Drug Administration Regulatory / labelling

Full Sources

Additive identity

E-number
E574, E575, E576, E577, E578, E579
Codex INS
INS 574, INS 575, INS 576, INS 577, INS 578, INS 579
Function
acidity regulator
Family
gluconates
EU Union list
authorised
Names
Gluconic acid; Glucono-delta-lactone; Sodium gluconate; Potassium gluconate; Calcium gluconate; Ferrous gluconate

Possible source pathways

The finished molecule can be identical across feedstocks. The Halal ruling follows the pathway, not the code alone.

  • microbial · Typical Halal Fermentation of plant carbohydrates or a defined microbial metabolite.
  • plant · Typical Halal The feedstock is plant.

E-number database Compare this family

White powder standing in for glucono-delta-lactone

Why this ruling

Gluconic acid, GDL, and gluconate salts (E574–E579) are Halal fermentation acidity regulators.[2][4]

GDL is a common tofu coagulant beside calcium sulphate.

Where you'll find it

  • Tofu and bakery acids
  • Black olive colour (ferrous gluconate)

How to verify

1) Match E574–E579, GDL, or gluconate. 2) Halal. 3) Olives and tofu still need a full ingredient read.

  • Gluconates → Halal fermentation.
  • GDL sets tofu.
  • Not rennet.

Conditions for Halal

  • E574–E579 → Halal fermentation salts
  • Cheese may still list animal rennet beside GDL

Scholarly differences

GDL is a slow acid, not a slaughter enzyme. It is a Halal coagulant option.

Frequently asked questions

Is GDL from milk?
No. It is fermented glucose (E575).
Is ferrous gluconate Halal in olives?
Yes. E579 is an iron gluconate salt.

Sources

Named Islamic, certifier, manufacturer, and regulatory sources used on this page. Inline markers like [1] jump here. Retrieval dates show when we last checked the live URL. Editorial methodology.

Certifier / jurisdiction

  1. SANHA — E-numbers

    SANHA

    Certifier: SANHA

    Certifier E-number literacy; not a product certificate.

    Retrieved:

Regulatory / labelling

  1. 21 CFR § 184.1685 glucono-delta-lactone

    U.S. eCFR

    U.S. identity / GRAS or colour-additive listing—not a Halal ruling.

    Retrieved:

  2. Regulation (EC) No 1333/2008 on food additives

    European Union

    Union-list identity—not a Halal certificate.

    Retrieved:

  3. European Commission — Food additives

    European Commission

    EU additive literacy hub.

    Retrieved:

  4. Codex GSFA online

    FAO / WHO Codex

    Codex INS / GSFA identity.

    Retrieved:

  5. U.S. FDA — Food additives

    U.S. Food and Drug Administration

    US identity / labelling context—not a Halal ruling.

    Retrieved:

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Applies to
General ruling; confirm local labels, slaughter, and certification when relevant
Last reviewed