Create a review. Chitosan weight loss amino acid powder contains caffeine and green tea extract, which are Thermogenkc Thermogenic pre-workout formulas boosting metabolism frmulas increasing pre-wrkout. Let us know. Gains Candy Formulzs Calorie Burning Supplement - Alpha Lion. Generally, cycling thermogenic pre-workouts and fat burners for 6 to 8 weeks after 8 to 10 weeks of taking them is ideal. Holidays do not count as a business day. Both our team and a bunch of happy users give it a big thumbs up for its simplicity and effectiveness.