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Answers: I found some made from the muscadine grape at the Old South winery in Natchez, but all the rest that all the other vitamin companies is made from the root of the knotweed plant and I have been told it is imported from China. I contacted the research doctor at M. D. Anderson cancer Center and he e-mail back some regular vitamin suppliers. i know they use pharmacutical grade from Canada but cannnot find out.. Thanks for any help.

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I haven't heard of much of any that are specifically grown in the U.S., mostly because the plants that contain Resveratrol in high enough potencies aren't grown in the U.S. (some can't be grown in certain climates).

If you are looking for a good quality Resveratrol product, you can still find one, even if it's grown in China... after all, many of the most beneficial herbs on Earth came from China, and they have been long lauded for their herbs. There have only been a few food products that came contaminated from China and only one or two contaminated batches of vitamins, but all of those were from very low quality companies.

As long as you buy products from companies that have high quality ratings with the GMP or USP ratings (that they have proof to back up), they won't deal with any of those low quality companies that were responsible for the couple contaminated batches.

Besides... if you buy from a company that says they don't get any herbs or vitamins from China, they are lying through their teeth. Over 70% of vitamins and 100% of vitamin C come from China at this point in time. That's why it's more important to verify the quality of the company you buy from.

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Here is a place to check:
http://search.lef.org/search/default.asp...
This may be better:
http://www.nutraingredients-usa.com/sear...
The first is Life Extension Foundation, the second is nutraingredients-usa, a supplement industry site.
Good luck! Also check the home page of nutraingredients. They have a European page, too.

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