Complex sentence: Supermalt is produced by Royal Unibrew in Denmark, who also manufacture Supermalt Plus, with added ginseng and aloe vera, and a ginger-flavoured variety called gingermalt.
Split into simpler sentences: Supermalt is produced by Royal Unibrew in Denmark. They have also released Supermalt Plus, with added ginseng and aloe vera, and a ginger-flavoured variety called gingermalt.