Light does more than fade photos.
More and more products now come in clear bottles. Marketing companies have apparently decided that the quickest way to appeal to people is to let them see their product. While I generally favor transparency, clear packaging is not a good thing. I do not know exactly what happens with each product, but I do know by definition any colored product must absorb light and that light will eventually cause it to degrade.
In any case, if you have a choice between clear packaging and something else, something else is generally a better choice. See foodsafetysite.com for more information on this problem.
About Mark Mizen
I have over twenty years professional experience in all aspects of photography and digital imaging. I am Chair of the ISO WG5 TG2 committee responsible for physical properties and durability of imaging material and am currently with HID Global working on systems for security printing for IDs, licenses, and credit cards. Previously, I was Director of Digital Development at Creative Memories from 2009 to 2012 and was responsible for the Creative Memories digital products and services. I also established and directed the Creative Memories Technology Center, which evaluated new products prior to product introduction, assisted with production difficulties, and provided technical information to support product sales.
I found the info at foodsafetysite.com very interesting and informative. Thank you. I think a factor in why glass (generally clear), is returning in popularity is the info about information of how BPA lined cans and plastic chemicals leaching particularly into acidic food (tomatoes), are impacting the biochemistry of our bodies. I know this is out of the usual area of your expertise (photo stuff and light), but I would hope someone so very science and truth-minded would look at all these factors and help us figure the best food storage strategies. Thank you.
See also http://www.popsci.com/science/article/2013-01/beersci-why-you-should-never-drink-beer-clear-glass-bottle