SST Support Burn Performix launches its straightforward liquid carnitine SST Burn Stack3d Performix SST v2X GNC Customer reviews for Performix SST Thermogenic Dietary Supplement, Timed Release Energy, Focus, & Metabolism, with Caffeine, Sensoril Ashwagandha, 40 Capsules Walmart.com Performix puts a lot more into energy and focus in its all new SST V3X Why does @coach.suave use L Carnitine? PERFORMIX SST Support Burn uses the simple, yet effective ingredient L Carnitine to: boost your metabolism utilize fat for energy, instead of muscle power you through your workouts