Stable and non-hygroscopic L-carnitine salts of organic acids are provided, each of which is present as a true complex salt, having the formula: ##STR00001## wherein Z is acetate, propionate, or butyrate. In addition, processes for the preparation of these compounds are provided, together with the use of these compounds as a source of both L-carnitine and the calcium ion in nutrition or as a pharmaceutical active ingredient having therapeutic pharmacological activity.