Body benefits L-Lysine is an essential amino acid and since we can’t make L-Lysine ourselves, supporting your intake through food or supplements helps ensure you get what you need. Think of it as giving your cells the building blocks for your muscles and organs through to your skin to hair. What makes it special Crafted with precision (hence the name), our Holland Barrett Precision Engineered L-Lysine is a high-strength formula created by experts to athlete-standard. “It’s Informed Sport certified, which means every batch is rigorously tested for the quality and purity you’d expect at professional competitions – there are no prohibited substances here,” explains our nutrition expert. “With 1000mg in every tablet, each serving is simple and reliable.” How to take Add one tablet a day with a meal into your routine without fuss