Nutrition21's nooLVL® Earns Top Spot in Player1 Launch nooLVL supports cognitive performance in a new line of gamer supplements News provided by Share this article Nutrition21") has announced that its clinically substantiated ingredient nooLVL ® is a key component in Player1, the latest introduction by Rule One Proteins, a leader in protein supplements. For its new line, Rule One Proteins sought out nooLVL for its cognitive benefits, specifically reaction time, accuracy, alertness, visual attention, and focus †. Billed as a "Gaming Performance Booster", Player1 is available in Rainbow Respawn and Gummy Grenade varieties. Some of the other ingredients in the product include L-theanine, carotenoids (lutein/zeaxanthin), natural-source, delayed-release caffeine, theacrine, choline and huperzine.