R1 Glutamine by Rule 1Rule 1 R1 Glutamine Rule 1 Glutamine is designed for athletes and fitness enthusiasts looking to optimize their recovery and enhance overall performance. Glutamine is one of the most abundant amino acids in the body, playing a crucial role in muscle recovery and immune system support. Rule 1 Glutamine offers a pure and unflavored supplement that can easily be added to your post workout shake or beverage of choice, providing essential support during