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Are Fatty Acid Salts (E470a, E470b) Halal?

It depends on what the label says.

Halal if verified
High confidence About this ruling

About this ruling

Condition
Source disclosure is incomplete
Evidence confidence
High means this page cites a primary regulator listing and a named Halal certifier source, retrieved 15 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

Reviewed

E470a (sodium, potassium and calcium salts of fatty acids) and E470b (magnesium salts) are the soap-like salts of the same fats that feed E471.

Next step On supplements, chocolate, and baked goods, match E470a/E470b, magnesium stearate, calcium stearate, or sodium palmitate and look for a plant, vegan, or Halal claim. How to verify
Scan a label

Photo: Dietmar Rabich · CC BY-SA 4.0

Additive identity

E-number
E470a, E470b
Codex INS
INS 470a, INS 470b
Function
emulsifier
Family
fatty acid salts
EU Union list
authorised
Names
Sodium, potassium and calcium salts of fatty acids; Magnesium salts of fatty acids; Sodium palmitate; Calcium stearate; Magnesium stearate

Possible source pathways

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

E470a Possible source pathways

  • plant Halal Typical Palmitic and stearic acids from palm, soy, or coconut, then converted to Na/K/Ca (E470a) or Mg (E470b) salts. Vegetarian claims confirm this route.
  • animal Halal if verified Tallow or lard fatty acids yield the same salts. Pork or non-zabiha fat is haram; audited zabiha tallow can be Halal.
  • undisclosed Halal if verified Typical US labels often name a specific salt (magnesium stearate, sodium palmitate) without the fat origin.

E-number database Compare this family

How to verify

  1. Match E470, E470a, E470b, magnesium stearate, calcium stearate, sodium palmitate, or 'salts of fatty acids'.
  2. Prefer vegan/vegetarian or Halal-certified packs.
  3. Ask supplement brands whether magnesium stearate is vegetable.
  4. Do not treat a kosher pareve mark as automatic Halal slaughter proof, but it does rule out pork fat.

Quick checks

  • E470a/E470b = salts of fatty acids = often 'magnesium stearate' in the US.
  • Fat source decides Halal status.
  • Vegetarian or Halal mark is the practical fix.

What decides the answer

  • Plant-fat E470a/E470b, or vegan/vegetarian claim

    Halal

  • Halal-certified product

    Halal

  • Pork or non-zabiha animal fat salts

    haram

  • Unspecified magnesium stearate / E470

    Halal if verified

Why this ruling

E470a and E470b are the sodium/potassium/calcium and magnesium salts of fatty acids—the same palmitic and stearic acids that appear in soap, chocolate, and tablet coatings. EU law splits them by mineral; Codex numbers them INS 470(i) and 470(ii). US dietary-supplement labels almost never say E470: they say magnesium stearate or calcium stearate. Those names belong on this page.[1][2]

EFSA’s re-evaluation is explicit that the fatty acids may be vegetable or animal. That sentence is the entire Halal issue. Plant salts are Halal. Animal salts follow slaughter: pork and non-zabiha tallow are haram; audited Halal tallow can be used. Unspecified magnesium stearate is mashbooh.[2][5]

Do not confuse these salts with E570 (the free fatty acids) or E471 (mono- and diglycerides). All three share a feedstock question; they are not the same additive. A vegan tablet claim, a Halal mark, or a brand FAQ that says “vegetable magnesium stearate” closes E470 for that product.

At a glance

Source Ruling
Salts made from vegetable oils Halal
From audited tallow of a Halal-slaughtered animal Halal
From pork or non-zabiha tallow Haram
Unspecified magnesium stearate Mashbooh

Where you will find it

Magnesium stearate is the anti-stick agent in most tablets, capsules and supplements, so it is the form most shoppers meet. Salts of fatty acids also appear in some sweets, baking powders and dried foods as anti-caking agents or emulsifiers.

Frequently asked questions

Is magnesium stearate Halal?
It is Halal when the stearic acid is vegetable or from Halal-slaughtered animals after audit. Unspecified magnesium stearate—very common in tablets—is Halal if verified.
What is the difference between E470a and E470b?
E470a is sodium, potassium or calcium salts of fatty acids; E470b is the magnesium salts. Same fat-source ruling.
Is this the same as E471?
No. E471 is mono- and diglycerides (glycerol + fatty acids). E470 is the salts of the fatty acids themselves. Both inherit the plant-versus-animal fat question.

Scholarly view

E470a and E470b share one Halal question (the parent fatty acid) and differ only in the mineral counter-ion. Magnesium stearate on a US supplement facts panel is usually E470b. Certifier mashbooh lists treat unspecified fatty-acid salts as source-dependent; they do not treat the magnesium ion as the problem.

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 — Mashbooh E-numbers

    SANHA Retrieved

    Certifier: SANHA

    Source-dependent fatty-acid emulsifiers listed mashbooh pending origin.

Regulatory / labelling

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

    European Union Retrieved

    Union-list identity for E470a and E470b.

  2. EFSA — Re-evaluation of sodium, potassium and calcium salts of fatty acids (E470a) and magnesium salts of fatty acids (E470b)

    European Food Safety Authority Retrieved

    Identity: salts of fatty acids that may be of vegetable or animal origin. Safety opinion, not Halal.

  3. European Commission — Food additives

    European Commission Retrieved

    EU additive literacy hub.

  4. Codex GSFA online

    FAO / WHO Codex Retrieved

    INS 470(i) / 470(ii) salts of fatty acids.

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