Sarah E Gamboni, BMBS. Amanda M Palmer, MPHC. Rosemary L Nixon FACD.
Allergic contact stomatitis to dodecyl gallate? A review of the relevance of positive patch test results to gallates
Article first published online: 4 SEP 2012
© 2012 The Authors Australasian Journal of Dermatology © 2012 The Australasian College of Dermatologists
Australasian Journal of Dermatology
Volume 54, Issue 3, pages 213–217, August 2013
How to Cite
Gamboni, S. E., Palmer, A. M. and Nixon, R. L. (2013), Allergic contact stomatitis to dodecyl gallate? A review of the relevance of positive patch test results to gallates. Australasian Journal of Dermatology, 54: 213–217. doi: 10.1111/j.1440-0960.2012.00941.x
Conflict of interest: none
- Issue published online: 2 AUG 2013
- Article first published online: 4 SEP 2012
- Manuscript Accepted: 16 JUN 2012
- Manuscript Received: 28 MAR 2012
- patch testing
Gallic acid esters or gallates are antioxidants used as preservatives in food and cosmetics. Few cases of gallates causing allergic contact dermatitis (ACD) have been reported in the literature. We present a case report of a 42-year-old beauty therapist who presented with a swollen tongue. Patch testing was positive to dodecyl gallate, commonly reported as being present in edible oil and oily foods such as margarine. Our patient avoided foods presumed to contain gallates and at the 6-week review reported a substantial improvement in her tongue symptoms. We reviewed our database and found 16 (7%) definitely or possibly relevant reactions to dodecyl gallate, seven (15%) definitely or possibly relevant reactions to propyl gallate and six (3%) definitely or possibly relevant reactions to octyl gallate. Most reactions were attributed to margarine, moisturising cream and lipstick. These products are often mentioned in the literature as containing gallates; however, ingredient labelling and discussions with manufacturers made it difficult to establish whether they are currently present in foods. Ascertaining relevance for these reactions is not always possible.