Pterostilbene And Resveratrol 50 mg/250 mg 60 vcaps by NOW Foods
Pterostilbene & Resveratrol 50 mg/250 mg 60 vcaps
Pterostilbene & Resveratrol 50 mg/250 mg - 60 Veg Capsules
Item catalog number: 3357
- Important for Glaucoma Care
- Free Radical Scavenger
- A Dietary Supplement
Pterostilbene is a naturally occurring polyphenol that is closely related to Resveratrol and has a similar biological activity. Pterostilbene, however, is more readily absorbed and utilized by the body. Emerging research suggests that Pterostilbene may support cardiovascular health, may help to maintain proper cell cycle regulation, and can promote a healthy response to cellular stress. NOW uses all-trans Pterostilbene, which has been clinically evaluated for its superior bioavailability, plus 250 mg trans-Resveratrol is added as a natural complement to Pterostilbene's metabolic activities.*
Resveratrol prevents the expression of glaucoma markers induced by chronic oxidative stress in trabecular meshwork cells. It is found in red wine, grapes, blueberries and other berries. Resveratrol also has additional neuroprotective effects that may be beneficial to glaucoma beyond the benefits to the trabecular meshwork.
|Serving Size:||1 Veg Capsule|
|Servings Per Container:||60|
|Amount Per Serving||% Daily Value*|
|* Percent Daily Values are based on 2,000 calorie diet.
† Daily Value not established.
|Trans-Pterostilbene (pTeroPure®)||50 mg||*|
|Polygonum cuspidatum Extract (Root/Rhizome)
(50% Natural Trans-Resveratrol - 250 mg)
Other Ingredients: Cellulose (capsule), Cellulose Powder, Stearic Acid (vegetable source) and Silica.
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
Caution: For adults only. Consult physician if pregnant/nursing, taking medication (especially anticonvulsants), or have a medical condition.
This product may cause digestive upset in some sensitive individuals. If you experience any gastrointestinal discomfort after using this product, discontinue use. Keep out of reach of children.
pTeroPure® is a registered trademark of ChromaDex, Inc.
Do Not Eat Freshness Packet. Keep in Bottle.
Store in a cool, dry place after opening. Please Recycle.
by Robert Ritch, MD.
Resveratrol (3,5,40-trihydroxystilbene), a powerful polyphenolic antioxidant, is found largely in the skins of red grapes and berries and came to scientific attention as a possible explanation for the low incidence of heart disease among the French, who eat a relatively high-fat diet (the French paradox). Many studies suggest that consuming alcohol (especially red wine) may reduce the incidence of coronary heart disease (CHD). Grape juice, which is not a fermented beverage, is not a significant source of resveratrol. A large number of studies in the past few years suggests its benefit in vitro and in vivo in a variety of human disease models, including cardioprotection, neuroprotection, immune regulation, and cancer chemoprevention. For an extensive review, see (Pervaiz & Holme 2009). Substantial data show that actions of resveratrol include inhibition of lipid peroxidation and platelet aggregation, metal chelating (primarily copper), free radical–scavenging activity, antiinflammatory activity, modulation of lipid metabolism, antifungal properties, and anticancer and estrogen-like activity.(Pervaiz & Holme 2009)
Resveratrol increases the lifespan of the yeast, Saccharomyces cerevisiae, the nematode, Caenorhabditis elegans, and the fruitfly, Drosophila melanogaster. It was later shown to extend the lifespan of the short-lived fish, Nothobranchius furzeri,(Valenzano & Cellerino 2006) and has now been shown to significantly increase the health and survival of mice on a high-calorie diet, pointing to a new approach to treating diseases of aging.(Baur et al. 2006) Among its multiple functions, resveratrol activates sirtuins (silent information regulator proteins), a family of proteins that play an important role in DNA repair, gene silencing, chromosomal stability and longevity.(Michan & Sinclair 2007)
The physiologic effects of resveratrol appear to be related to its ability to regulate nutrition and longevity genes.(Pervaiz & Holme 2009) Resveratrol is an effective antioxidant.(Frankel et al. 1993; Chanvitayapongs et al. 1997; Shigematsu et al. 2003) It inhibits lipid peroxidation of low-density lipoprotein (LDL), prevents the cytotoxicity of oxidized LDL, and protects cells against lipid peroxidation.(Chanvitayapongs et al. 1997) Resveratrol protects against the degeneration of neurons after axotomy.(Araki et al. 2004) A single infusion of resveratrol can elicit neuroprotective effects on cerebral ischemia-induced neuron damage through free radical scavenging and cerebral blood elevation due to nitric oxide release.(Lu et al. 2006) Its antiapoptotic activity has led to the suggestion that resveratrol may make a useful dietary supplement for minimizing oxidative injury in immune-perturbed states and human chronic degenerative diseases.(Losa 2003)
Levels of intracellular heme (iron-protoporphyrin IX), a pro-oxidant, increase after stroke. In neuronal cell cultures, resveratrol induces heme oxygenase 1, suggesting that increased heme oxygenase activity is a unique pathway by which resveratrol can exert its neuroprotective actions.(Zhuang et al. 2003)
Resveratrol directly inhibits CYP1B1. The versatility of RSV lies in its diverse targeting of membrane and intracellular receptors, signaling molecules, biogenesis enzymes, oxidative systems, DNA-repair mechanisms, and transcription factors, and it can activate or repress a number of signal-transducing pathways found throughout the cell (Pervaiz & Holme 2009)
There appears to be an association between aging and neurodegenerative diseases, such as Alzheimer’s, and that modulation by both caloric restriction and drugs which mimic caloric restriction, such as resveratrol, can ameliorate these diseases.(Liu et al. 2007) Resveratrol reduces the levels of secreted and intracellular amyloid-ß peptides by proteosomal degradation.(Marambaud et al. 2005)
In the eye, resveratrol suppresses selenite-induced oxidative stress and cataract formation in rats.(Doganay et al. 2006) The authors suggested that the presence of oxidative stress in selenite cataract development and its prevention by resveratrol support the possibility that high natural consumption of resveratrol in food can help prevent human senile cataract. Resveratrol also induces dilation of retinal arterioles, suggesting a potential benefit for this compound in the treatment of retinal vascular disease.(Nagaoka et al. 2007) Sirtuin-1 activators (such as resveratrol) demonstrate neuroprotective properties in mouse models of optic neuritis and multiple sclerosis.(Shindler et al. 2007)
- Araki T, Y Sasaki & J Milbrandt (2004): Increased nuclear NAD biosynthesis and SIRT1 activation prevent axonal degeneration. Science 305: 954-5.
- Bagchi D, M Bagchi, S Stohs & et al (2002): Cellular protection with proanthocyanidins derived from grape seeds. Ann N Y Acad Sci 957: 260-270.
- Bagchi D, CK Sen, SD Ray & et al (2003): Molecular mechanisms of cardioprotection by a novel grape seed proanthocyanidin extract. Mutat Res 523-524: 87-97.
- Barden CA, HL Chandler, P Lu & et al (2008): Effect of grape polyphenols on oxidative stress in canine lens epithelial cells. Am J Vet Res 69: 94-100.
- Baur JA, KJ Pearson, NL Price & et al (2006): Resveratrol improves health and survival of mice on a high-calorie diet. Nature 444: 337-342.
- Chanvitayapongs S, B Draczynska-Lusiak & AY Sun (1997): Amelioration of oxidative stress by antioxidants and resveratrol in PC12 cells. Neuroreport 8: 1499-1502.
- Doganay S, M Borazan, M Iraz & Y Cigremis (2006): The effect of resveratrol in experimental cataract model formed by sodium selenite. Curr Eye Res 31: 147-53.
- Frankel EN, AL Waterhouse & JE Kinsella (1993): Inhibition of human LDL oxidation by resveratrol. Lancet 341: 1103-1104.
- Kalin R, A Righi, A Del Rosso & et al (2002): Activin, a grape seed-derived proanthocyanidin extract, reduces plasma levels of oxidative stress and adhesion molecules (ICAM-1, VCAM-1 and E-selectin) in systemic sclerosis. Free Radical Res 36: 819-825.
- Liu Q, F Xie, R Rolston & et al (2007): Prevention and treatment of Alzheimer disease and aging: antioxidants. Mini Rev Med Chem 7: 171–180.
- Losa GA (2003): Resveratrol modulates apoptosis and oxidation in human blood mononuclear cells. Eur J Clin Invest 33: 818-823.
- Lu KT, RY Chiou, LG Chen & et al (2006): Neuroprotective effects of resveratrol on cerebral ischemia-induced neuron loss mediated by free radical scavenging and cerebral blood flow elevation. J Agric Food Chem 54: 3126-31.
- Marambaud P, H Zhao & P Davies (2005): Resveratrol promotes clearance of Alzheimer’s disease amyloid-beta peptides. J Biol Chem 280: 37377–82.
- Michan S & D Sinclair (2007): Sirtuins in mammals: Insights into their biological function. Biochem J 404: 1–13.
- Nagaoka T, TW Hein, A Yoshida & et al (2007): Resveratrol, a component of red wine, elicits dilation of isolated porcine retinal arterioles: role of nitric oxide and potassium channels. Invest Ophthalmol Vis Sci 48: 4232-9.
- Nair MP, C Kandaswami, S Mahajan & et al (2002): Grape seed extract proanthocyanidins downregulate HIV-1 entry coreceptors, CCR2b, CCR3 and CCR5 gene expression by normal peripheral blood mononuclear cells. Biol Res 35: 421-431.
- Natella F, F Belelli, V Gentili & et al (2002): Grape seed proanthocyanidins prevent plasma postprandial oxidative stress in humans. J Agric Food Chem 50: 7720-7725.
- Pataki T, I Bak, P Kovacs & et al (2002): Grape seed proanthocyanidins improved cardiac recovery during reperfusion after ischemia in isolated rat hearts. Am J Clin Nutrition 75: 894-899.
- Pervaiz S & AL Holme (2009): Resveratrol: Its Biologic Targets and Functional Activity. Antioxidants Redox Signaling 11: 2851-2897.
- Raina K, RP Singh, R Agarwal & C Agarwal (2007): Oral grape seed extract inhibits prostate tumor growth and progression in TRAMP mice. Cancer Res 67: 5976-82.
- Shao ZH, LB Becker, TL Vanden Hoek & et al (2003): Grape seed proanthocyanidin extract attenuates oxidant injury in cardiomyocytes. Pharmacol Res 47: 463-469.
- Shigematsu S, S Ishida, M Hara & et al (2003): Resveratrol, a red wine constituent polyphenol, prevents superoxide-dependent inflammatory responses induced by ischemia/reperfusion, platelet-activating factor, or oxidants. Free Radic Biol Med 34: 810-817.
- Shindler KS, E Verntura, TS Rex & et al (2007): SIRT1 activation confers neuroprotection in experimental optic neuritis. Invest Ophthalmol Vis Sci 48: 3602-9.
- Valenzano DR & A Cellerino (2006): Resveratrol and the pharmacology of aging: a new vertebrate model to validate an old molecule. Cell Cycle 5: 1027-32.
- Yamakoshi J, M Saito, S Kataoka & S Tokutake (2002): Procyanidin-rich extract from grape seeds prevents cataract formation in hereditary cataractous (ICR/f) rats. J Agric Food Chem 50: 4983-4988.
- Zhuang H, YS Kim, RC Koehler & S Dore (2003): Potential mechanism by which resveratrol, a red wine constituent, protects neurons. Ann N Y Acad Sci 993: 276-286.
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