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A more recent approach being investigated is the use of therapies targeting the IGF ligands directly to reduce their bioavailability

A Trial by Trial Analysis Reveals More Intense Physical Activity is Associated with Better Cognitive Control Performance in Attention-Deficit/Hyperactivity Disorder Behavioral and cognitive effects of tyrosine intake in healthy human adults Effect of vitamin D supplementation as adjunctive therapy to methylphenidate on ADHD symptoms: A randomized, double blind, placebo-controlled trial Neurochem Res doi: 10.1007/s11064-005-8826-8

Journal of Applied Physiology, 105(6), 1828-1835.

Such changes in the liquid pharmaceutical forms have a particularly negative effect on the amount of active ingredient contained in the individual dosage form and should be avoided as far as possible from a medical point of view