circulation blood medlineplus.gov/druginfo/natural/1019.html diretrizes de dosagem de Saúde NIH; Medline Plus: Pycnogenol 50 a 450 miligramas de Pycnogenol diária MedLine Plus: Pycnogenol medlineplus.gov/druginfo/natural/1019.html Pycnogenol Pycnogenol