Nutes from ebay - anyone used it?

I bought 3 bottles of this nutrient from ebay recently and recieved it yesterday. It says that it is organic (which i think it is) but it smells like bovril! it smelled so much like bovril that i tasted it on the top of my finger and it even tastes like bovril with maybe somthing else in it. The seller has good feedback and sells quite a lot of this, anyone know what it is, is it just some yeast product?

Im awaiting a reply from the seller.

Surely these nutes have got a name? More information is needed if we are able to help you.
Have you tried reading the label?