E518AcidulantLow concern
Magnesium Sulfate
In plain words
The short version
'Epsom salt' — a firming agent, tofu coagulant, and brewing salt that also supplies magnesium.
Why it's green
It's widely considered safe at the amounts used in food, so we mark it green. The Safety section below has the details.
01Origin
Where it comes from
'Epsom salt', occurring naturally as the mineral epsomite; also produced from magnesium sources.
02Usage
How it's used
Firming agent and tofu coagulant, a brewing salt used to adjust water hardness, and a magnesium source and nutrient.
03Safety
Safety profile
No ADI specified. Poorly absorbed; larger oral amounts act as a saline laxative — the traditional use of Epsom salts.
04Properties
Physical & chemical properties
Colorless crystals, freely water-soluble, with a bitter taste.
05Regulation
Regulation worldwide
Permitted in the EU, the US (GRAS), and globally.
Educational information only. Not medical or dietary advice.