Beauty products that have been available since the ’80s are few and far between. (Miss you so much, Malibu Musk.) Something has to be truly beloved to avoid the bitter guillotine that is discontinuation. Take Biosilk Silk Therapy Serum, for example. The original formula of this leave-in hair defrizzer has been around and unchanged for more than 30 years, thanks in part to an enthusiastic following that’s earned it a whopping four Allure Readers’ Choice honors.

And if it ain’t broke, don’t fix it, right?

Well, it definitely ain’t broke, but for the first time in three decades, the fan-favorite formula is getting an upgrade.

BioSilk has just launched Silk Therapy with Organic Coconut Oil. Like the original, it contains amino-acid-rich silk for its reparative and smoothing properties, but it also features, as you might have guessed from the name, organic virgin coconut oil. (That moment coconut oil was having? It’s still having it.)

This new formula promises to be especially moisturizing due to coconut oil’s nourishing essential fatty acids, but it’s just as lightweight as the replenishing original, absorbing quickly to add softness and shine to the hair. The biggest difference the coconut oil makes? BioSilk is marketing it not only as a leave-in treatment for hair, but as a conditioning treatment for skin, too. It even leaves a softly glowing finish, so you can be truly lustrous from head to toe.

Don’t worry, Silk Therapy loyalists — the original formula isn’t going anywhere. (Could you imagine the outcry?) But if you’re looking for an organic upgrade to an already-awesome product, BioSilk Silk Therapy with Organic Coconut Oil is now available on

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