Review on 💪 JNX Sports The Shadow Preworkout: Enhanced Stimulant for Intense Workouts - Energizing Effect, Heightened Focus, Superior Strength Amplifier, 350mg Caffeine, Suitable for Both Genders, Fruit Punch Flavor, 30 Servings by Tim Arnold

Definitely effective. I will not use more than 1 scoop. I feel redness within 10-15 minutes. It seems to last about an hour and I'll stay up all night if I take it after 4pm. The flavor (Blue Raspberry) was a bit weak, so I started using 8-10 ounces of water (which helped). You can't go wrong if you want it cheap. I will buy it again. Most pre-workouts no longer work for me. This was the exception.