Hi
I would recommend she take Aloe Vera gel since it contains a spectrum of nutrients and long chain sugars which can help boost the immune system. Forever Living Products produce the leading Aloe Gel, it contains no man-made chemicals and is not filtered, so is as near to nature as can be. If you would like to find out more please check out www.mcbteam.co.uk - I am a distributor for these wonderful products, and can only speak highly of them as I have been using them for myself and my family for the last six years.
Kind regards