stone.. you might also want to reduce how much you are taking and then gradually build it up so your body acclimates. When I took it, I didn't notice anything like fatigue or really any side effects. But I was only taking like .3ml at a time I think, basically a few drops. And I never had any "withdrawal" problems at all when I quit taking it.
And yes, doesn't it just taste delicious? It has got to be the most disgusting thing I have ever tasted. But after awhile you won't even notice the taste.
The stuff worked like a champ for me when I had a clinically classified "high output" ileostomy. It truly was a lifesaver.
good luck.