Moducare is a South African product being sold locally as well as in the UK, among other countries. On the index page of the UK based website, www.moducare.info, the following claim was made: "Internationally recognized research using Moducare®, shows that this proprietary extraction of plant nutrients helps to bring overall balance to your immune system."
I laid a complaint with the UK ASA on the 9th May 2011 which has resulted in the company removing this claim from the website. (UK ASA website; Adjudications – Informally Resolved Cases: Huxley Europe 15 June 2011.) This would suggest that there was insufficient evidence to support this claim.