AllMax Nutrition Rapidcut Shredded is the most concentrated and researched-backed supplement, making it the best thermogenic fat burner. The thermogenic formula with 3-stage T.R.I fat-burning technology contains 350mg of Caffeine and 20:1 pure Cinnamon extract and is the strongest and most comprehensive fat-burning product. The supplement is also enriched with a green coffee extract that supports healthy insulin levels and Ashwagandha, a renowned Ayurvedic adaptogenic plant that boosts energy levels, reduces stress, and prevents inflammation.