GABA Black is Sentia's most intense expression. It goes dark in every sense: the colour is nearly black, the aroma is smoky and herbal, and the flavour runs to spiced pepper, bitter earth, and a long, slowly fading warmth. The production uses cold-blend extraction, meaning there is no fermentation or dealcoholisation involved; the botanicals are blended directly. The functional angle is real here. Where GABA Red leans into relaxation, Black is positioned around energy and focus through ginseng and ginkgo. Whether you notice a functional effect is between you and your neurotransmitters, but as a drinking experience it holds up on its own. The body has a slight viscosity that makes it feel more substantial than a tonic, and the finish is long enough to be interesting. Works neat or lengthened with soda.