Pine Bark Extract (Pycnogenol) for Blood Pressure Regulation

Research suggests that pine bark extract (Pycnogenol) may help reduce both systolic and diastolic blood pressure, with this finding supported by multiple meta-analyses and systematic reviews published between 2018 and 2025, most of which report statistically significant reductions across randomized controlled trials. Reviews focusing specifically on cardiometabolic outcomes and broader cardiovascular health consistently point in the same direction, with proposed mechanisms including antioxidant activity, anti-inflammatory effects, and improved blood vessel function related to nitric oxide production. However, the overall body of evidence carries important limitations: two systematic reviews, including one conducted in the style of a Cochrane review, rated the certainty of evidence as very low due to small sample sizes, inconsistent outcome measures, short study durations, and poor reporting quality across individual trials, and a 2012 review concluded the evidence was insufficient to support firm conclusions for any chronic condition. Studies indicate that while the directional signal is promising and fairly consistent across newer pooled analyses, readers should be aware that the foundational trial data underpinning these meta-analyses has been critiqued for methodological weaknesses, and larger, more rigorously designed studies would strengthen confidence in these findings.