I just got a comment from “Samuel” who says:
I did my research on the ingredient quercetin in stemulite.
Some Researchers said that healthy people should stay away from quercetin because they don’t know if it can cause cancer or not. Until they solve that, I will not be taking stemulite and stay away from it until they are clear that it doesn’t cause cancer.
Samuel, did you do your research?
First, quercetin is naturally-occurring. Here’s what Wikipedia says:
Foods rich in quercetin include capers, lovage, apples, tea, onion, especially red onion (higher concentrations of quercetin occur in the outermost rings), red grapes, citrus fruit, tomato, broccoli and other leafy green vegetables, and a number of berries including cherry, raspberry, bog whortleberry, lingonberry, cranberry, chokeberry, sweet rowan, rowanberry, sea buckthorn berry, crowberry, and the fruit of the prickly pear cactus.
I simply Google’d “quercetin cancer” and these were the first two entries:
This first one is from the American Cancer Society …
Most of the research on quercetin and cancer has been done in cell culture or animal studies. These types of studies can suggest possible helpful effects, but they do not provide proof that such effects can be achieved in humans. It is still unclear how well quercetin is absorbed by the human body when taken by mouth. Controlled clinical trials are needed to show whether or not quercetin has helpful properties in humans.
Studies done in cell cultures in the lab have shown that quercetin has activity against some types of cancer cells. This may be due to its antioxidant or anti-inflammatory properties, or it may be due to other mechanisms. Recent studies suggest that quercetin can slow the growth of cancer cells and can help foster apoptosis, a form of natural cell death that doesn’t happen in most cancer cells. Some studies in animals have shown that quercetin may help protect against certain cancers, particularly colon cancer.
Then there was this abstract which you can also find here on PubMed
Antioxidants and Cancer III: Quercetin
Quercetin is a flavonoid molecule ubiquitous in nature.
A number of its actions make it a potential anti-cancer agent, including cell cycle regulation, interaction with type II estrogen binding sites, and tyrosine kinase inhibition.
Quercetin appears to be associated with little toxicity when administered orally or intravenously. Much in vitro and some preliminary animal and human data indicate quercetin inhibits tumor growth. More research is needed to elucidate the absorption of oral doses and the magnitude of the anti-cancer effect.
I know better than to attempt to make medical claims concerning quercetin, Stemulite, and cancer, but the prevailing evidence we have indicates that quercetin probably doesn’t cause cancer.
Also, each and every ingredient in Stemulite has been deemed “GRAS” or “Generally Recognized As Safe” by the FDA.
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{ 2 comments… read them below or add one }
did u seriously just use wikipedia as a resource?
It’s obviously something the average person can identify with. Besides, there’s nothing in that quote that anyone would call debatable.