This article originally appeared on InStyle.com.

The Kardashian sisters legit have an arsenal of beauty secrets. And the latest tip comes from Khloé Kardashian. The youngest Kardashian sister seems to be a huge fan of Amazon. (Hello, two-day shipping!) And believe it or not, she discovered some awesome beauty products on the mega retailer's website.

"I've been obsessed with gold masks lately," Kardashian reveals on her app and website. She's not the only one. We've spotted so many celebrities indulging in 24-Karat masks before red-carpet events and photo shoots. Even all of the models in the Victoria's Secret Fashion show prep for the event with luxurious gold masks that costs hundreds of dollars. But there's no need to empty the ATM to experience a skin-illuminating mask. Kardashian swears by an $8 version that you can cop from Amazon. It's called the EBP Medical 24k Gold Bio-Collagen Facial Mask. "I'll give myself a facial with this collagen-infused version the night before a big shoot so that my skin is plump and moisturized," Kardashian explains.

EBP Medical 24k Gold Bio-Collagen Facial Mask

Obviously, the gold particles will boost your skin's radiance. But if you're not familiar with collagen, it's a naturally-occurring protein found throughout the body, which gives skin its firmness. As you get older, collagen production slows down. That's why you might notice a lost of elasticity and ultimately fine lines and wrinkles. But using beauty products that include the key ingredient can help slow down the process.

Thanks, Khlo-Money for another amazing beauty find. We're going to go ahead and add two to our shopping carts before it's too late.

We’re never getting over our girl crush on Gal Gadot, who reprises her role as Diana Prince/Wonder Woman in this month’s Justice League. One move that got her superstrong: push presses followed by an active rest hold. "It works your triceps, shoulders, quadriceps, glutes, and hamstrings while also helping with overall body coordination to eliminate muscle imbalances," explains Hayley Bradley, an instructor with Gym Jones, which whips Gadot and other actors into superhero shape.

How to do it: Stand with feet shoulder-width apart, holding an 8- to 10-pound dumbbell in each hand just outside shoulders, with arms bent and palms facing in. Bend knees and lower into a half squat (A), then explosively push up with legs while pressing weights up over shoulders (B); lower weights back to start. This is 1rep. Do as many as possible in 30 seconds. Next, for an active rest, rotate palms forward and extend arms up, keeping elbows close to ears (C); hold for 30 seconds. Cycle through this circuit 4 times. Do it 4 or 5 times a week for stronger, more defined arms in as little as 6 weeks.

This article originally appeared on RealSimple.com.

Parabens have been widely used in products to prevent bacteria growth since the 1950s. “About 85 percent of cosmetics have them,” says Arthur Rich, Ph.D., a cosmetic chemist in Chestnut Ridge, New York. “They’re inexpensive and effective.” New York City dermatologist Fran E. Cook-Bolden explains, “Parabens have a long history of safe use, and that’s why they’re commonplace. New preservatives have less of a proven track record.” In fact, typically, more than one form of the ingredient is used in a product. The most common are butylparaben, methylparaben, and propylparaben. Over the last few years, however, in response to customer concerns, many brands have started to manufacture (and label) paraben-free products, including lotions, lipsticks, shampoos, scrubs, and more.

So What’s the Problem?

In the 1990s, parabens were deemed xenoestrogens―agents that mimic estrogen in the body. “Estrogen disruption” has been linked to breast cancer and reproductive issues. And in 2004 British cancer researcher Philippa Darbre, Ph.D., found parabens present in malignant breast tumors. As a result, experts in many countries are recommending limits on paraben levels in cosmetic products. What’s more, watchdog organizations worry that if parabens can be stored in the body, over time they could have a cumulative effect and pose a health risk.

But here’s the flip side: Critics of the British study point out that noncancerous tissue from healthy breasts wasn’t examined to see if parabens were also present there, and that the presence of parabens in tumors doesn’t prove that they caused the cancer. Other studies have shown parabens to have a very weak estrogenic effect. All this leads to concern about the unknown. Cook-Bolden tells her patients that “so far there’s no scientific evidence to support any link with any form of cancer.” Currently, the amount of parabens in any product is typically quite small. The U.S. Food and Drug Administration and the World Health Organization consider the chemicals safe at low levels.

The Bottom Line?

There’s reason to be mindful, but no reason to have an all-consuming concern about these chemicals. If it helps you rest easy, use a paraben-free body lotion (which coats a large area of skin). Today there are a number of formulas available from paraben-free brands (see below). Labels that list the preservatives as one of the last four ingredients also indicate that the chemicals are present in very small amounts, says Andrea Kane, editor of Theorganicbeautyexpert.com.

If you want to play it extremely safe, use a few oil-based organic products that don’t contain water (which calls for a preservative). They often come in dark containers with a pump so that light and air don’t degrade them quickly. “With truly natural products, just stay within their use-by date,” says Kane…