Yes. To quote Montsko et al. (2008):
Resveratrol is a red pigment found in the skins of red and purple grapes, but not green grapes. Red wines have resveratrol, rose wines have some, but not much, and white wines have no resveratrol. The deeper the red, the more resveratrol the wine has. Syrrahs, Merlots, and Zinfandels have high resveratrol levels.
food webs contain many food chains however a food chain shows only one primary source and food webs contain more than one primary source.
Most resveratrol sold in Israel is of low purity (50%), such as Solgar. Resveratrol 50% contains lower amount of trans-resveratrol, compared to Mega-Resveratrol brand, which is a 99% pure trans-resveratrol product. Trans-resveratrol is the beneficial substance in resveratrol.
Resveratrol can be found in foods such as red grapes, red wine, peanuts, and berries. It is also available as a dietary supplement in the form of capsules or pills, which can be purchased at pharmacies, health food stores, or online.
There is a site called Resveratrol Products, and they give a lot of good information including how to properly read the ingredients label and what to look for in the ingredients. They also have a product which contains whole dried muscadine grape, which is the grape with the highest amount of natural resveratrol, as well as a high purity trans-resveratrol from another source.
Resveratrol is a kind of natural antioxidants, which can reduce blood viscosity, inhibit platelet coagulation and vasodilation, and keep the blood flowing. Resveratrol can be used to prevent the occurrence of cancer, atherosclerosis, coronary heart disease, ischemic heart disease and high cholesterol. As a result, resveratrol has been taken for health food. As the market demand grows, there are many countries and regions all over turn to the development of resveratrol and its products. Resveratrol also have certain side effects, so the operation and manufacturing process should be complied to certain strict restrictions.
Resveratrol is a very good product for inside and outside of the body and if the products also contain natural ingredients, then it is a very good buy and may work.
YES
I know of no studies or discussions involving resveratrol and menstruation. I'd say review your nutritional history. The following foods contain resveratrol: blueberries, cranberries, bilberries, grapes, peanuts, red wine and Japanese knotweed. If any of these have interfered with your cycle before, then resveratrol could be a concern. If not - then it likely won't. Resveratrol is a nutrient just like Vitamin A, Vitamin C, Lutein, Magnesium and Calcium are. Oooh - one last thing proanthocyanidins and resveratrol are natural blood thinners. So if you're taking a blood thinner and using resveratrol - you may be getting too much blood thinning.
It may contain a trace amount but carbohydrates, as a food group, are not a source of dietary calcium.
The best source is Resmedin Nutraceuticals. They are the oldest manufacturer and have a patented formula that really works. Their website is www.600mg.com