For me, nitrox therapy works best. It will be mercilessly good for your workout and will be just as effective after several weeks of use. You can buy it at any Biotech USA store and it is not expensive. Here's a description of it on Shop.builder.hu. PREPARE FOR THE EXPLOSION! NitroX Therapy is a professional pre-workout formula, straight from BioTech USA labs. Like all other BioTech USA products, Nitrox Therapy contains safe, carefully selected nutrients.NOx NRG Learn what a dose of nitric oxide activator can do: AAKG, citrulline malate, beta-alanine, L-arginine HCl, and L-arginine nitrate! ATP POWER Thanks to caffeine, increased alertness and concentration can be true companions during workouts, while vitamin B3 helps reduce fatigue and exhaustion.CARBORADE Forget aspartame and discover CarboRADE, a real carbohydrate-xylitol mixture! CREA-TONATOR A special mixture of six different creatines at your service: creatine pH-X, micronized creatine, creatine HCl, tricreatine malate, creatine ethyl ester, creatine pyruvate.Recommended use: Add 17 g (1 heaped spoon) NitroX Therapy for 2.5 dl of cold water. One dose 30 minutes before training.