Post
by rasarver » Thu Feb 25, 2010 7:56 am
Thanks you for your 2 year shelf life post. It's the first time I've heard of that.
I'm using the last couple of containers of vitamin C crystals that I bought seven years ago. The crystals are still white as ever, free-flowing, and seen to be as potent as ever. The containers are well sealed and I keep them in a heated/air conditioned space that controls the temperature within a few degrees of 70F.
I read somewhere of vitamin C crystals that changed colors (became a little darker than the usual bright white) after a couple of years of storage.
I worked in the chemical industry for many years. I've run aging and accelerated aging studies of complex organic molecules. The rule of thumb is that aging (degradation) doubles for every 10 degrees C temperature increase. In other words, an organic compound degrades twice as fast at 30C as it does at 20C.
I find it interesting that livon labs says that after one year in controlled temperature storage that their Lypo C is still 100 per cent effective. If that is true it means that the rate of degradation of their product is zero. If the rate of degradation is zero, it will still be 100 per cent effective after 10 years or 100 years. I think what livon labs means is that the rate of degradation is either too small to measure with their standard technique or too small to be significant. In any case, it means that their product will be essentially 100 per cent effective for many years.