The present invention relates to a storage-stable aqueous or gel-like
composition or solution comprising a magnesium compound selected from a
magnesium salt or a magnesium complex compound, and L-carnitine, and the
use thereof for the preparation of a medicament for supporting
metabolism, in particular in muscle tissue, and for supporting muscle
structure, and its use as food supplement or in the veterinary sector as
animal feed additive, in particular for horses, poultry, pigeons, pigs,
cattle, sheep and camels.