Hi All, I'm having difficulty determining if I have a problem with a batch of ascorbic acid. I attempted to use this ascorbic acid in a couple of developers, both of which had anemic results. In addition, I've attempted to make sodium ascorbate with it and it appeared to me that there wasn't much in the way of 'fizzing' when I added sodium bicarbonate to the ascorbic acid. The ascorbic acid is store bought from a local pharmacy (with an expiry date well into 2008) and I think that it that's why it has less activity. I've heard that store purchased vitamin C is not as active as industrial use ascorbic acid. Has anyone had similar experiences with their ascorbic acid?