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For a start, because these products are being sold illegally, there is no way of knowing if they are what they say they are, and not contaminated by dangerous chemicals
Therefore, there is no basis for making claims about L-theanine as an ADHD treatment
Once purchased the course can also be accessed from your account page which is accessed by logging into the Visage Training Website and then accessing your account page
doi:10.1556/OH.2012.29370 Lee HJ, Li CW, Hammerstad SS, Stefan M, Tomer Y
10.3389/fphar.2019.00941 41 GuanL.ChenY.WangY.ZhangH.FanS.GaoY.et al (2019)
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