Frequently Asked Questions
As of August 2018, iHerb is using 3rd Party Independent Labs ABC Testing, Eurofins and Alkemist to test product. Using a 3rd Party Independent Lab guarantees that the results are objective and unbiased.
iTested confirms that the information provided on a product Supplement Facts Panel and/or Nutrition Facts Panel is correct. Products are also tested to confirm Clean Label Standards such as a Microbial Analysis and a Heavy Metal Analysis.
The test methods are referenced on each iTested product document.
Products will be tested every 6 months.
NAC (N-acetyl-L-cysteine) is a modified form of the amino acid cysteine commonly used as an ingredient in dietary supplements. Formulations and amounts vary by brand; review the product label.
No. NAC (N-acetyl-L-cysteine) and glutathione are different ingredients. Although related, they are not the same compound.
Review the product label for important warnings, precautions and directions for use. If you have questions about whether NAC is appropriate for you, consult your healthcare provider before use.
NAC is available as standalone capsules, powders and in combination formulas paired with ingredients such as glycine.
NAC is generally sold as a single, standardized compound rather than having multiple chemically distinct forms the way minerals like zinc or magnesium do. Differences between products mostly come down to the amount per capsule, other paired ingredients, and capsule versus powder format.
