PERQUE K2/D3 Plus Guard™ Webinar In Ask Dr. J, News by Justin WeltonJuly 3, 2019 Dr. Russell Jaffe discusses the in’s and out’s of PERQUE’s new supplement, K2/D3 Plus Guard™. Click here to request samples. Did you enjoy this post? We have a weekly Facebook Live that we think you’d love! Like our page here to check it out.