Resveratrol and pterostilbene: A comparative overview of their chemistry, biosynthesis, plant sources and pharmacological properties

ABSTRACT

Both resveratrol and pterostilbene are monomeric stilbenes having a 6−2−6 carbon skeleton with two phenyl ringslinked by a double-bonded ethylene bridge. Resveratrol has three hydroxyl (−OH) groups, while pterostilbene hastwo methoxy (–OCH3) groups and one −OH group. They commonly occur in the trans form rather than the cis form.Red grapes and red wines are the main dietary sources of the resveratrol. Pterostilbene occurs in blueberries andgrapes. Resveratrol and pterostilbene exhibit many similarities in pharmacological properties, including antioxidant,neuroprotective anti-cancer, cardioprotective, analgesic, anti-atherosclerosis, anti-aging, anti-diabetic, antiinflammatory, and anti-obesity activities. The stronger pharmacological properties in pterostilbene than resveratrolhave been attributed to its two –OCH3 groups. As a result, pterostilbene is more lipophilic which enhances itsmembrane permeability, bioavailability, and biological potency. Some future studies on resveratrol and pterostilbeneare suggested. The sources of information cited in this comparative overview were from Science Direct, GoogleScholar, and PubMed.