The world has made encouraging progress to eliminate trans fat, but more than 4 billion people remain at risk. In a new oped published in BMJ and Al Jazeera, Dr. Tom Frieden, president & CEO of Resolve to Save Lives, and Dr. Tedros Adhanom Ghebreyesus, Director General of World Health Organization, share how countries can join the movement to protect their populations from this toxic food additive. Since 2017, global protection has increased from 6% of the population to 49%. By adopting the best practice policies outlined in WHO’s REPLACE package, countries can cut health care costs and save lives.