A quaternised protein from lemon, listed as a humectant.
What it is
Hydroxypropyltrimonium lemon protein is, according to CosIng, a quaternary ammonium salt; as the INCI name indicates, it is a lemon protein modified with hydroxypropyltrimonium groups, which give it a positive charge. CosIng lists it as a humectant.
Where it is used
Appears on the ingredient lists of a small number of products.
Limits of interpretation
The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.
The INCI name does not show which part of the lemon the protein comes from, its molecular weight or the degree of substitution.
Functions
- Humectant
- Retaining and/or preserving the moisture in a product during use.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.

