The diet margarita contains "extremely low levels" of a food preservative called sodium benzoate, claims Beam Global, the company that bought the line of cooktails from the ex-reality star for a cool $120 million back in March.

 

And though there's just a teeny-tiny bit of it, the failure to disclose the chemical caused Whole Foods to yank the product from the shelves. A rep for the store said in a statement that the preservative "does not meet our quality standards."

So why is this trace preservative such a big deal? Well, for one, the Skinnygirl website claims the product has "all natural ingredients, no preservatives or artificial colors" and is the "margarita you can trust." And, sodium benzoate is a potentially carcinogenic preservative if mixed with Vitamin C.

But before anyone goes firing off a scary PSA about Skinnygirl products, note that sodium benzoate is a "very common" preservative and you'd have to devour "a huge amount of it" in order to hit toxic levels, according to the drink's rep. Worth mentioning: The same preservative is found in products like salad dressing and soft drinks. It's also a main ingredient in fireworks...
Despite the possible health risks, the former Real Housewives of New York City star defends the drinks and claims they're as close as you can get to a completely natural product.

"Skinnygirl cooktails were created to solve a problem: to create a line of guilt-free cooktails allowing women to drink the indulgent drinks they actually want to drink with as few ingredients as possible," she said (via E! Online) "I'm not making wheatgrass here.