California Gold Nutrition's L-Lysine 500 mg highlights its use of AjiPure L-Lysine, a trademark of Ajinomoto, which signifies a high-purity, pharmaceutical-grade amino acid produced through fermentation. This focus on premium ingredient sourcing can be a significant draw for discerning consumers. Each capsule delivers 500mg of L-Lysine, an effective dose for daily support of immunity, skin, and hair health. At 11 cents per serving, its price is on the higher side for a 500mg L-Lysine product, but it reflects the 'AjiPure' quality and the brand's reputation for transparent sourcing. Its high review count suggests consumer satisfaction with this premium offering.