1 Source Supplements is known in the United Kingdom for putting together detailed, purpose-driven formulas that go beyond the basics. The brand has products that hit mainstream-level categories as well as more specialized areas, like glucose disposal agents. One of its longer-running entries is the stimulant-free fat burner Shredded1, and this month, 1 Source has given the supplement a complete refresh with a new look, updated positioning, and an improved formula.
The revamped Shredded1 is built around thermogenesis and calorie burning, thanks to a hefty 400mg of NNB Nutrition’s ZinjaBurn and 100mg of CaloriBurn GP. Those ingredients are included specifically to support metabolic rate, energy expenditure, and brown fat activation. Joining them is 100mg of coleus forskohlii, an ingredient commonly used to support lipolysis and body composition.
While many fat burners lean heavily on stimulants, as mentioned, Shredded1 goes a different route by not having any caffeine at all. It still has a good amount of focus components at a full gram of tyrosine, and 100mg of Cocoabuterol contributes for energy and mood support. Rounding it all out is 50mg of GBBGO-branded GBB to support thermogenesis and carnitine production, helping round out the supplement’s weight management intentions.
Last but not least, bringing everything together is 10mg of BioPerine, helping maximize absorption and overall efficacy of the 2026 edition of Shredded1. The updated Shredded1 has plenty of thermogenic power and a bit of focus to make up for the lack of caffeine, and overall, it’s better at burning fat. You can grab the supplement straight from the brand’s website, and the price is right around that of some of its other items at £35.99 (48.23 USD) a bottle.
