The complete Berserker line. Stim, focus, pumps — the whole arsenal.Berserker Stim when you want the full send. Berserker Focus when the work needs your head more than your heart rate. Berserker Serum for caffeine-free blood flow and endurance, stackable with either.What's inside:Berserker Stim — the flagship stim pre-workout. Berserker Focus — built focus-first: L-tyrosine led, energy second. Berserker Serum — pumps and endurance, zero caffeine.$159.97 bought separately. $135.97 as the stack. Every dose is on the label.