“Best” usually means: (1) standardization, (2) trustworthy manufacturing, and (3) dose/form matching your goal.\n\n1) Standardization: the label should clearly state the amount of trans-resveratrol, ideally backed by third-party testing/COA.\n\n2) Manufacturing trust: GMP compliance, batch numbers, expiry dates, heavy-metal/pesticide testing, and supply chain transparency matter.\n\n3) Dose/form fit: trials use a wide dose range, so “higher is better” is not a safe rule. Some people experience GI intolerance even at lower doses. Bioavailability is limited; certain formulations may improve absorption, but that doesn’t always equal superior clinical outcomes.\n\nIf you’re on blood thinners, planning surgery, pregnant/breastfeeding, or taking multiple medications, focus on the safest decision with a clinician/pharmacist rather than chasing a “top brand.”