Safety of Phosphatidylserine Containing omega3 Fatty Acids in ADHD Children: A Double-Blind Placebo-Controlled Trial Followed by an Open-Label Extension

Eur Psychiatry. 2013 Aug;28(6):386-91. doi: 10.1016/j.eurpsy.2012.11.001. Epub 2013 Jan 9.


Objective: To evaluate the safety of phosphatidylserine (PS) enriched with omega3 fatty acids, mainly eicosapentaenoic (PS-Omega3) in children with attention-deficit hyperactivity disorder (ADHD).

Methods: Two hundred children diagnosed with ADHD were randomised to receive either PS-Omega3 (300mg PS-Omega3/day) or placebo for 15 weeks. One hundred and fifty children continued into an open-label extension for an additional 15 weeks in which they all consumed PS-Omega3 (150mg PS-Omega3/day). Standard blood biochemical and haematological safety parameters, blood pressure, heart rate, weight and height were evaluated. Adverse events and the Side Effect Rating Scale were also assessed.

Results: One hundred and sixty-two participants completed the double-blind phase. No significant differences were noted between the two study groups in any of the safety parameters evaluated. One hundred and forty participants completed the open-label phase. At the end of this phase, no significant changes from baseline were observed in any of the studied parameters among participants who consumed PS-Omega3 for 30 weeks.

Conclusions: Study results demonstrate that consumption of PS-Omega3 by children with ADHD, as indicated in a 30-week evaluation period, is safe and well tolerated, without any negative effect on body weight or growth.

Keywords: ADHD; Docosahexaenoic acid (DHA); Eicosapentaenoic acid (EPA); Omega3; Phosphatidylserine (PS).

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Attention Deficit Disorder with Hyperactivity / drug therapy*
  • Child
  • Double-Blind Method
  • Drug Administration Schedule
  • Fatty Acids, Omega-3 / adverse effects
  • Fatty Acids, Omega-3 / therapeutic use*
  • Female
  • Humans
  • Male
  • Phosphatidylserines / adverse effects
  • Phosphatidylserines / therapeutic use*
  • Treatment Outcome


  • Fatty Acids, Omega-3
  • Phosphatidylserines