High temperatures, humidity may degrade vitamin C supplements.
The Los Angeles Times (3/3, Stein) "Booster Shots" blog reported that keeping vitamin C supplements in the bathroom or kitchen may expose them to "humidity and high temperatures" that "may seriously degrade" them, according to a study published online in the Journal of Agricultural and Food Chemistry. After observing "the stability of two types of vitamin C -- sodium ascorbate and ascorbic acid, both also used as food additives -- under a variety of humidity and temperature states," food scientists discovered that "humidity and temperature caused degradation in both forms." In fact, storing vitamin C above a certain humidity level made the vitamin more unstable under higher temperatures.
The UK's Daily Mail (3/4) quotes a study author saying that the degraded supplements are "not necessarily unsafe...but why take a vitamin if it doesn't have the vitamin content you're hoping to get?"
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