The indefatigable Kardashian sisters are as go-getting as ever. Or perhaps I should say glow-getting with the launch of new sunless tanning range. Not only do they want us all to share their mahogany hue, but with Kardashian Sun Kissed they want us to be safe and healthy as well. The Kardashians care.

At least according to Kourtney. The Kardashian Sun Kissed sunless tanning range is “good for your skin and healthy for you; everything is paraben- and sulfate-free,” Kourtney said. “We love beauty and fashion, but making sure we’re taking care of our bodies is crucial to us.” 

I hate to break this to you, Kourtney, especially as you and the girls may have (if the celeb gossip mags are right) a bit of a financial crisis going on, but I took a look at Kardashian Instant Sunless Spray ($19.99), and I spotted a few things that were most definitely not “good for your skin and healthy” quicker than I could say fake tan.

If you’ve ever wondered how tan from a can works (I have a feeling that the Kardashians haven’t been agonizing too much about this), then here goes. It’s all down to something called dihydroxyacetone (DHA), which is the key ingredient in Instant Sunless Spray. It has some nasty side effects. Hairless Mexican dogs (rather like the one Paris Hilton can be seen clutching) used in a study contracted severe dermatitis after coming into contact with DHA.

Ironically, DHA can make the skin more susceptible to free-radical damage from the sun. So if you spray yourself with a fake tan because you want to avoid sun damage from sunbathing in pursuit of a real tan, you could just be making matters worse.

This increased sensitivity to sun damage was the conclusion of a Korean study in 2007. Forty minutes after researchers treated skin samples with DHA they found that more than 180% additional free radicals formed during sun exposure compared with untreated skin. What's more, another study found that dihydroxyacetone also has an effect on the amino acids and nucleic acids that may be carcinogenic.

Kardashian Instant Sunless Spray also has butylphenyl methylpropional and benzyl benzoate, fragrance additives that are restricted by the International Fragrance Association because they are irritants, linalool (which may be cytotoxic) and the potential neurotoxin, phenoxyethanol. But it is true, as Kourtney says, there are no parabens.

And if its any consolation, the Kardashian Cabana Glow line is getting some love over at Spa Week Daily

Ingredients: Water (Aqua), SD Alcohol 40-B, Dihydroxyacetone, Ethoxydiglycol, Aloe Barbadensis Leaf Juice, Erythrulose, Polysorbate 20, Isopentyldiol, Diglycerin, Caprylyl Glycol, Citric Acid, Fragrance (Parfum), Linalool, Benzyl Benzoate, Benzyl Salicylate, Butylphenyl Methylpropional, Phenoxyethanol, Caramel, Carmine (CI 75470)