Sodium Chloride--which is better?

[DrJMW]

If I purchase NaCl from the USA grocery store, from a USA chemical manufacturer, or from a Korean manufacturer, which is better? All three sources, if legitimate, will sell me chemically identical NaCl. Now, assuming legitimacy, the USA chemical manufacturer's NaCl may be the "purest." The grocery store's may not be as pure, since is it possible that FDA standards aren't as strict as USP standards. If the Korean equivalent of our USP sets high standards, then its NaCl will be just as "pure" as the USA manufacturer. This reasoning applies to rHGH as well as most other drugs, food and water. The trick is to find the legitimate, high quality rHGH at the lowest price. Standards are different from country to country, even for the same med and the same manufacturer. It is tough to generalize, but we try. Interestingly, the ansomone from china is great quality; the "sterile water" that they sent to reconstitute was the problem. This is a great example of the differences between USP standards and foreign country equivalents.