In controlled preclinical research a red edible seaweed called Eucheuma cottonii L. produced a 91 % reduction in breast tumor volume in tumor‑bearing rats over 28 days while the frontline anti‑estrogen drug Tamoxifen only achieved a 71 % reduction in the same timeframe and untreated controls saw tumor size nearly double, a stunning result documented in a peer‑reviewed study indexed. PMID: 23441613 Underscoring that compounds in seaweeds can exert powerful antitumor effects and highlighting the n

"Guso" or "guso lato" refers to the seaweed known as Eucheuma cottonii or Kappaphycus species, commonly found in the Philippines and used for carrageenan production. It is also known as "elkhorn moss". | Ramil Lao Gentugaya