Seaweed in Indonesia has potential as an antioxidant. One of the seaweeds that have potential is Eucheuma cottonii. Eucheuma cottonii seaweed is one type of seaweed that has the ability to inhibit free radicals. The purpose of this study was to analyze the antioxidant potential and determine the total phenolic compounds content of Eucheuma cottonii seaweed. This research was conducted in April …