L-Arginine is a conditionally essential Amino Acid that can be obtained via the diet. In some situations, the body’s requirement for Arginine can be greater than production. Bulk L-Arginine supplement is 100% L-Arginine and is an ideal pre-workout ingredient. Unflavoured. Available in 100g, 500g, and 1kg pouches. Ingredients: 100% L-Arginine. Suitable for Vegetarians, Non-GM, Gluten Free, Dairy Free, Lactose Free, Soya Free.