Dr Hulda's Liver Cleanse: Extra ingredients

Do I really need to use HCL to sterilize the olive oil? Is this really hydrocloric acid? I don't like the idea of that!

And what about ORNITHINE? Is this L-Ornithine? I am not familiar with either but found a bit on the latter. Do I need this and what is it really? I see it sold all over the web but didn't see a good info (non-commercial) site.

As for Black-Walnut Ticnture, this sounds okay although I have never used it before. How much do I put in?