Purity and Dosage
There are no formal requirements for standardization or quality control of dietary supplements in the United States, and the dosage of effective ingredients in supplements may vary widely from brand to brand or batch to batch. Studies of ephedra supplements have found significant discrepancies between the labeled dose and the actual amount of ephedra in the product. Significant variation in ephedrine alkaloid levels, by as much as 10-fold, was seen even from lot to lot within the same brand.
Read more about this topic: Ephedra
Famous quotes containing the words purity and and/or purity:
“Do not be discouraged, if in a thousand instances you find your kindness rejected and wronged, your good evil-spoken of, and the hand you extend for the relief of others, cast insultingly away; the benevolence which cannot outlive these trials of its purity and strength, is not like the self-sacrifice of him, who went about doing good.”
—C., U.S. women’s magazine contributor. American Ladies Magazine, pp. 331-4 (July 1828)
“In the religion of all nations a purity is hinted at, which, I fear, men never attain to.”
—Henry David Thoreau (1817–1862)