Therefore , the present meta- analysis does not suggest any significant effect of pycnogenol  on BP
Results of previous clinical trials evaluating the effect of pycnogenol supplementation on  blood pressure ( BP )  are controversial .
An examination of the effects of the antioxidant Pycnogenol® on cognitive performance, serum lipid profile, endocrinological and oxidative stress biomarkers in an elderly population
The study examines the effects of the antioxidant flavonoid Pycnogenol on a range of cognitive and biochemical measures in healthy elderly individuals . The study used a double-blind , placebo-controlled , matched-pair design , with 101 elderly participants ( 60—85 years ) consuming a daily dose of 150 mg of Pycnogenol for a three-month treatment period . Participants were assessed at baseline , then at 1 , 2 , and 3 months of the treatment . The control ( placebo ) and Pycnogenol groups were matched by age , sex , body mass index , micronutrient intake , and intelligence . The cognitive tasks comprised measures of attention , working memory , episodic memory , and psychomotor performance . The biological measures comprised levels of clinical hepatic enzymes , serum lipid profile , human growth hormone , and lipid peroxidation products . Statistically significant interactions were found for memory-based cognitive variables and lipid peroxidation products , with the Pycnogenol group displaying improved working memory and decreased concentrations of F2-isoprostanes relative to the control group
Therefore , the present meta- analysis does not suggest any significant effect of pycnogenol  on BP
Results of previous clinical trials evaluating the effect of pycnogenol supplementation on  blood pressure ( BP )  are controversial .