The present invention relates to a method for adjunctive treatment of cancer by using a Lycogen composition to inhibit metastasis, comprising administering a Lycogen composition to the subject, wherein the Lycogen composition comprises an effective amount of a Lycogen extract, wherein the Lycogen extract comprises active ingredients selected from ζ-carotene, neurosporene, spheroidenone, methoxyneurosporene or a combination thereof.
