Propylene glycol/glucose, molasses, selenium & vitE ... I think. Plus whatever magic they put in it to make it absorb super quick into the blood stream. It's just an energy booster.
Would be good to be able to make up an emergency home-made alternative for when you are out of kick start and the shops are shut!
I see Nettex now make another product called Lamb Care, but that contains probiotics and colostrum + vitamins, so probably more specific to lambs that are compromised by bacteria (e-coli etc).