Reza Anindita, M.Si Pengarang Afrinia Eka Sari, S.TP., M.Si. Pengarang Wening Cahyani Pengarang

Antioxidants are active substances that can counteract free radicals, where free radicals can trigger infectious and non-communicable diseases. Antioxidants are found in many vegetables and fruits. Jalembi (Jambu, Lemon, Melon, Bit) drink is an alternative source of antioxidants that can counteract free radicals. Guavas, lemons, melons, beets are fruits that contain vitamin C, which is a substance that acts as an antioxidant. The purpose of this research to determine the antioxidant contain of fermented Jalembi drink using Lactobacillus Plantarum. The reason for using lactobacillus plantarum in this research is because lactic acid bacteria are commonly used in the fermentation process and also have the advantage of being resistant to acidic pH and several studies have stated that these bacteria can survive in the digestive tract. The research design is an experimental study with a completely randomized design. The three formulas differ primarily in sugar content, with formula 1 containing 10% sugar, formula 2 containing 20%, and formula 3 containing 30%. The results of the analysis of antioxidant activity in the three formulas were very weak or there was no antioxidant activity. In terms of toxicity analysis, jalembi probiotic drink is safe for consumption and the average panelist acceptance results of the three formulas are quite favorable. Suggestions for further research should test the antioxidant contain without bacteria fermentation process.