“New Product Development of a Premenstrual Syndrome Supplement, Focusing on the Nutraceutical Ctive Ingredients; Pycnogenol, Lemon Balm, Ginger, and Saffron”. 2023. London Journal of Medical and Health Research 23 (7): 55-85. https://journalspress.uk/index.php/LJMHR/article/view/336.