Nature Knows Best
Since 2008 Natural Biology has recommended whole grape extract for Resveatrol using the exclusive grapes found in the Rhone Valley of France, known for their high resveatrol content.  Now studies show that using the whole grape, what we always thought, provides the most benefit.  Vintage Resveatrol 100% uses the entire grape which is why the absorption rate of the active ingredient, trans resveratrol,  is over 93% compared to other products below 8%.  And, you recieve all the benefits of the grape including grape seed extract.   
Whole Grape is Best
The grape antioxidant resveratrol has been a topic of intense research for the past three decades. Resveratrol and other grape ingredients, as well as whole-grape products, have shown considerable promise in health promotion and disease management. Phytochemically, whole grape represents a natural combination of resveratrol and other phytonutrients, as it contains several catechins, anthocyanins, polyphenols, and flavonols. Thus, the whole grape products or specific combinations of grape constituents provide us with the possibility of synergistic interactions leading to improved efficacy. Recent research has suggested that whole-grape products may help in maintaining heart health and protect against aging, aging-associated diseases, neurodegeneration, and some cancers. Based on the available recent literature, the grape or whole-grape products seem to be safer choices for better health and disease prevention. However, for advanced disease conditions, individual grape ingredients (such as resveratrol) or combinations of multiple ingredients together with existing therapies appear to be better approaches. Further clinical studies are needed to understand the benefits of grapes and their products in the prevention and management of specific diseases.
The research on the antioxidant resveratrol found in grapes has been robust over the last thirty years, highlighting the potential health benefits of grapes and grape-based products. Grapes are a rich source of various phytonutrients, including resveratrol, catechins, anthocyanins, polyphenols, and flavonols, which together might offer synergistic health effects. Recent studies suggest that consuming whole-grape products can contribute to heart health, slow down aging processes, prevent age-related diseases, neurodegeneration, and certain cancers. While whole grapes and grape products are considered safe and beneficial for general health and disease prevention, the use of specific grape compounds like resveratrol might be more effective in treating advanced diseases when combined with conventional therapies. Nonetheless, further clinical research is necessary to fully understand the scope of health benefits grapes and their derivatives can provide in disease prevention and management. This underscores the importance of lifestyle changes, including diet improvements, for a healthier life in a time where longevity has increased but so has the risk of chronic illnesses.
Resveratrol Mis-Represented
Some resveratrol products use polygonum cuspidatum and add grape powders to make the claims of whole grape but the integrity of the resveratrol is not improved.   You're just paying for window dressing, not the dress - and you're be cheated.  The difference between them and Vintage Resveatrol 100% is we use the whole grape from the get-go, and our extraction methods are the purest in the world, and the extract cost 20-30 times what grape powders cost - otherwise we'd use grape powder and we'd never recommend anyone take polygonum cuspidatum - it is popular because it's cheap and abundant but scientifically a waste.