Observations of iodine oxide (IO) were made in the Indian Ocean and the Southern Ocean marine boundary layer (MBL) during the 8th Indian Southern Ocean Expedition. IO was observed almost ubiquitously in the open ocean with larger mixing ratios south of the Polar Front (PF). Contrary to previous reports. IO was not positively correlated to sea surface temperature (SST)/salinity. https://parisnaturalfoodes.shop/product-category/norwegian-cod-liver-oil/