Alpha GPC is a precursor to the neurotransmitter acetylcholine. Clinically it s been used both orally & intramuscularly to treat Alzheimer s disease vascular dementia stroke transient ischemic attack TIA as well as to improve memory cognitive function & learning. Clearly you don t have to be a physician to see that it has profound effects on the nervous system. However prior to Dr. Ziegenfuss not many researchers thought to test alpha GPC on advanced athletes. On the other hand