Never seen that in a colmado, and I think I also never saw these in a supermarket...
However, some supermarket have dietetic areas, where you might find some fancy products, so the last word is not said...
Interesting, given how many products in global trade now bear one or more of these, especially appliances, detergents, paper products and "soil improvers," that none seem to have penetrated the DR market from Canada, Spain, Taiwan, Japan...