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They are less accurate than lab analysis, so a positive home result is best confirmed by a lab, and anyone testing because of illness or flooding should rely on a lab from the start

Small variations can occur depending on rounding conventions, but the underlying math is identical

One is the peptide's stability in solution

The reverse, adding too little water, creates an overly concentrated solution with the same problem in the opposite direction

Xia L, Nordman T, Olsson JM, Damdimopoulos A, Bjorkhem-Bergman L, et al

Rising consumer demand for anti-aging, skin-brightening, immune support, and liver detoxification products is driving the adoption of glutathione across oral supplements, functional foods, and topical cosmeceuticals