I haven't noticed a huge difference on how it increases your strength or energy. But I will admit I used to bench 305lbs and now i can almost bench 330. I dont know if it has to do with me gaining 10 pounds of body weight or if the nexus did the trick. I stack this supplement with a preworkout neurocore. I just got done with Nexus 850 through one bottle of day and one bottle of night. I have 9 more sets. I will write another review if anything improves.