About the item: Function: Promotes muscle growth, enhances energy Directions: Take two (2) capsules once daily Shelf life: 2 years Features: -L-Arginine is a powerful amino acid that boosts blood circulation, helping deliver essential nutrients and oxygen to your muscles for improved athletic performance. Supports healthier circulation, endurance and energy. Not only is arginine known for boosting blood flow and muscle growth, it’s also a popular supplement for supporting energy production, endurance and vascular function. -Immune health support – L-arginine is a semi-essential amino acid that helps promote a healthy immune system response and is a key building block for maintaining healthy tissue and bones.