Mammoth - Swell Caffeine Free High Intensity Pre-Workout - 30 Servings Mammoth Swell is a caffeine-free pre-workout that tastes as good as the profile looks. The reason so many people reach for Mammoth Swell is that it helps maximize your workout performance without the need for stimulants, while also supplying you with powerful nootropics that allow you to get dialed into your training and put 100% of your focus on the task at hand. Caffeine Free Performance | Strength | Nootropic 500mg Lion's Mane 1000mg Agmatine Sulfate 4000mg L-Citrulline 300mg Alpha-GPC 200mg Maritime Pine No Artificial Colours or Dyes NPN 80108212