Ruwan gansakuka, wanda kuma aka sani da tsantsar gansakuka na Irish, an samo shi ne daga Carrageensis crispum, jan algae da aka fi samu a bakin Tekun Atlantika. An san wannan tsantsa don wadataccen abinci mai gina jiki, gami da bitamin, ma'adanai da polysaccharides. Ana amfani da tsantsa ruwan teku akai-akai azaman thickener na halitta da wakili na gelling a cikin masana'antar abinci da abin sha. Hakanan ana amfani da ita wajen samar da abubuwan abinci, magungunan ganye da samfuran kula da fata saboda yuwuwar fa'idodin kiwon lafiyarta, irin su abin da ake faɗin anti-inflammatory, antioxidant and moisturizing Properties.