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In addition, unmetabolized acetyl groups in the brain may be incorporated into various neurotransmitters [114, 150], but it would be an exaggeration to suggest that the availability of acetyl groups has a direct impact on neurotransmitter release at synapses

In many in vitro studies, acetylcarnitine concentrations exceed physiological levels by up to 1000-fold [18, 101, 145, 146]

Pharmacol Rev 74:506551 Daneman R, Prat A (2015) The bloodbrain barrier

The specific L-Carnitine-L-Tartrate (LCLT) form utilized by Pure Encapsulations is backed by a highly robust body of sports medicine literature, which has profound, direct implications for chronic illness patients managing severe exercise intolerance and PEM