Swanson's L-Lysine Pharmaceutical Grade provides 500mg of L-Lysine Monohydrochloride per capsule, indicating a high standard of purity often associated with pharmaceutical-grade ingredients. This level of purity can be reassuring for consumers seeking a clean and effective supplement. At 7 cents per serving, it offers a very competitive price for a product with this quality claim, making it an attractive option for daily support of immunity, skin, and hair health. The consistent positive reviews further support its reliability and consumer satisfaction.