A Randomized Double-Blind Placebo-Controlled Trial of a Purported Dietary Supplement Cognitive Enhancer in Healthy Teenage Subjects 2022 Ingredient: Alpha-GPC,Phosphatidylserine,Pyrroloquinoline quinone (PQQ),Spearmint Indication: Cognitive function Trial Type: Clinical Trial Sponsor: HK Pros Journal: Journal of Exercise and Nutrition Authors: Lois Lin, Ashley LeMoire