Iridoids are natural glycation inhibitors.

Glycoconj J. 33 (4): 671–681. 2016. 
Iridoids are natural glycation inhibitors.
West BJ, Deng S, Uwaya A, Isami F, Abe Y, Yamagishi SI, Jensen CJ.

In vitro and in vivo studies which reveal the anti-AGE potential of iridoids are discussed in this review, along with possible mechanisms of action. The existing data indicate that the consumption of iridoid food sources may help limit AGE accumulation within the body. (original abstract available at https://www.ncbi.nlm.nih.gov/pubmed/27306206).