l-carnitine fumarate vs l-carnitine tartrate Doctor's Best with Biosint Carnitines, 855 mg, 60 L-Carnitine Showdown: Fumarate vs Tartrate

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J Nutr 133(11 Suppl 2):3957S3964S Harding JW, O'Fallon JV (1979) The subcellular distribution of carnosine, carnosine synthetase, and carnosinase in mouse olfactory tissues

10.1073/pnas.1007625107