Many of the earliest albums were credited to The Section on the cover art and booklets.
Their discography is now hard to find and detailed participation in that project is now hard to find. Their current website (2022) does not mention the albums by name, just in the history. Talking of the albums, but not using the Vitamin name. The Wayback machine does name some of their collaborations here.
Those Vitamin performances were as The Section. Since (at least) 2004 they have been performing as The Section Quartet with basically the same line-up of artists.