E470 is a quiet ingredient. It rarely appears in large amounts and it does nothing to the flavour, but it turns up across powdered foods and supplements. It belongs to the same family of questions as several other emulsifiers on a label.
What E470 is
Take a fatty acid and neutralise it with a mineral and you get a fatty acid salt. E470a covers the sodium, potassium, and calcium salts. E470b covers the magnesium salts. The most familiar member of the group is magnesium stearate, which appears in a very large share of tablets and capsules.
The minerals themselves are not a halal question. The fatty acid is, and it is exactly the same question raised by E471, E472, and E481. Fatty acids used in food manufacturing are produced from vegetable oils such as palm and soy, and from rendered animal fat. Both are ordinary.
E470, E471, E472, E475, and E481 all resolve to the same underlying ask: where did the fatty acid come from?
Where you will find it
- Powdered products: drink powders, seasonings, and soup mixes, keeping them free flowing.
- Supplements: as a flow agent in tablet and capsule manufacture.
- Confectionery: as a release and anti-sticking agent.
- Baked goods: as an emulsifier and stabiliser.
The supplement case
Magnesium stearate deserves its own mention because of how often it appears. It is used to stop powder sticking to tablet presses, so it shows up in the other ingredients line of a great many supplements. The magnesium stearate guide covers it in detail, including how to ask about it.
How to check it
- Note the exact code, E470a or E470b, or the written name.
- Look for a halal mark and confirm the certificate covers the product and market.
- Without a certificate, ask the manufacturer for the fatty acid source.
- Group this question with the other emulsifiers on the same label rather than asking separately about each.
Run the whole list through the halal E number checker to catch every code in this family at once.
What to ask the manufacturer
Please confirm the origin of the fatty acids used in the fatty acid salts in this product, including any magnesium stearate. Are they derived from vegetable oil or animal fat, and if animal, from which species?
Frequently asked questions
Is E470 halal?
E470 can be halal, but the code does not record the source. These additives are fatty acids combined with a mineral, and the fatty acid may come from plant oils or animal fat. Certification or a manufacturer answer is needed to know which.
What is the difference between E470a and E470b?
E470a covers the sodium, potassium, and calcium salts of fatty acids. E470b covers the magnesium salts. The mineral differs; the underlying fatty acid question is the same.
What is E470 used for?
It works as an anti-caking agent, keeping powders free flowing, and as an emulsifier and stabiliser. You will find it in powdered products, seasonings, confectionery, and supplements.
Is magnesium stearate the same as E470b?
Magnesium stearate is a magnesium salt of stearic acid and falls within this family. It is extremely common in tablets and capsules and carries the same fatty acid source question.
Does E470 appear in supplements?
Frequently. Fatty acid salts are used as flow agents in tablet and capsule manufacturing, which is why they appear in the other ingredients section of supplement labels.
Can the label tell me the source?
Generally not. Labelling rules require the additive to be named or numbered, but they do not require the origin of the fatty acid to be printed on the pack.