Tetrasodium Glutamate Diacetate
GLDA
No meaningful concern for most people; irritation is possible but rare.
Also written as: GLDA · Tetrasodium Glutamate Diacetate (Dissolvine GL)
What it is
Tetrasodium glutamate diacetate is made from glutamic acid, which is produced by fermentation, and it binds metal ions in much the same way as EDTA. Its selling point is that it breaks down readily in wastewater treatment, so brands choosing it are usually addressing EDTA's environmental persistence rather than any skin-safety issue.
What it does well
Works like EDTA but degrades readily in the environment
It sequesters calcium, iron and copper across a wide pH range, protecting the formula from oxidation and discolouration, and it meets readily-biodegradable classification in standard OECD testing.
Moderate evidence
Where the EU stands
No specific restriction
Not restricted for cosmetic use in the EU; it appears in no Annex of the Cosmetics Regulation.
Masks that contain Tetrasodium Glutamate Diacetate
Balea
Gesichtsmaske Glass Skin Hyaluronic Be You
29th of 30 on the label
below ≈1%
Be Routine
Schlafmaske Glow & Hydrate
27th of 27 on the label
below ≈1%
essence
Queen of Pink Face Sheet Mask 01 Keeping My Pink Poker Face
16th of 23 on the label
below ≈1%
Eucerin
Hyaluron-Filler Hyaluron Intensive Mask
7th of 11 on the label
below ≈1%
Filorga
Time-Filler Mask
10th of 20 on the label
below ≈1%
Schaebens
Gesichtsmaske Feuchtigkeit Sofort-Effekt
34th of 38 on the label
below ≈1%
SEINZ.
Tuchmaske hydro effect
17th of 21 on the label
below ≈1%
Selfie Project
Gesichtsmaske regulierend #CoolKoala
21st of 27 on the label
below ≈1%
The Beauty Mask Company
Bubble Glow Tuchmaske Crazy Cactus
24th of 25 on the label
below ≈1%