Monster series 100% Glutamine and L-Glutamine Monster are both glutamine supplements that can help support muscle growth, immune function, and recovery. Glutamine plays a key role in protein metabolism, intestinal health, and nitrogen balance in the body. Intense exercise, stress, and poor nutrition can deplete natural glutamine levels, leading to muscle breakdown. Glutamine supplements may help spare muscle, increase protein synthesis, boost energy stores, and support immune health. Overall, these glutamine supplements can be beneficial for physically active individuals looking to enhance recovery and muscle-building efforts.