Tamarind seeds contain a polysaccharide with a branched chain structure similar to the mucin found in the eye, which helps protect and wet the corneal surface. Eye drops containing this polysaccharide are being studied in dry eye syndromes.
Research on tamarind for skincare has shown that, at least in the lab, tamarind has an effect on skin cell proliferation, including the proliferation of fibroblasts, which are the cells responsible for building collagen. Other research suggests tamarind seed offers some protection against UV damage
Natural Medicines Comprehensive Database
Paula’s Choice Beautypedia
Dermatology Research and Practice, ePublication, September 2013
Journal of Cosmetic Science, March-April 2012, pages 119-131