AMINO ACID SUPPORT - NAC is a stable form of non-essential amino acid cysteine. NAC helps facilitate essential biological functions by bonding with two other amino acids, glutamine and glycine to create a powerful antioxidant known as glutathione.* ABSOLUTE PURITY - ZERO SYNTHETIC ADDITIVES, FILLERS, HEAVY METALS, MICROS - You will never see unnecessary additives such as stearates, dioxides, glycerides or fillers other brands use to make manufacturing cheaper, faster and easier. In addition, we put all ingredients and products through rigorous testing to make sure they are 100% free of contaminants. UNQUESTIONABLE QUALITY - Our products are manufactured in facilities that undergo rigorous third-party audits to ensure the highest standards of quality. This strict quality assurance process is designed to meet and exceed industry standards, ensuring that our products are of the highest caliber supplements in the market place. ZERO UNNATURAL INGREDIENTS - Our product contains NO unnatural ingredients such as magnesium stearate, silicon dioxide, titanium dioxide and other potentially harmful unnatural ingredients that are commonly found in other brands. NO RISK AND NO HASSLE - For almost a decade, we have been delighting Amazon customers. If you are not satisfied with the benefits, results, or are unsatisfied with the product in any other way, please contact us and we'll gladly refund your money in 48 hours or less. That's it - no questions, no hassle, no risk. ​ NAC is a stable form of non-essential amino acid cysteine. NAC helps facilitate essential biological functions by bonding with two other amino acids, glutamine and glycine to create a powerful antioxidant known as glutathione.* NAC naturally contains sulfur, which gives it a strong aroma and aftertaste. This may be more noticeable in warmer storage conditions and shipping during warm or hot weather. In airtight containers these natural sulfur aromas have nowhere to escape, so they concentrate inside and can seem stronger when you first open the seal. This normal characteristic does not indicate spoilage. While some brands add masking agents and/or artificial excipients to reduce odor—we do not. We keep this formula clean, with only organic rice hulls as a natural flow aid. Taking with water or a light snack can help minimize any taste.