Tufts University agrees with my suggestion to check with your health care provider and offers these other tips regarding the use of supplements:
• Be skeptical of claims on product websites that sound over the top, such as those in all CAPITAL LETTERS or with multiple exclamation points. If studies are cited, see if they have been published in peer-reviewed scientific journals. You can check for the study in the National Library of Medicine’s PubMed database
• Investigate the experts quoted. Are they independent researchers or physicians who are qualified to speak in the field being addressed – or are they paid for their endorsement?
• Use good judgment. If it sounds too good to be true, it most likely is.
• Don’t assume that the product can’t hurt you, even if it doesn’t help you. The FDA warns that “dietary supplement manufacturers may not necessarily include warnings about potential adverse effects on the labels of their products.” Remember that claims that a product is “herbal” and “natural” do not guarantee its safety.
From the Tufts University Health & Nutrition Letter Volume 10G