Dark under eye circles are among the top beauty concerns many women have—and one of the hardest to treat. No matter how many hours of sleep you may have gotten, those pesky dark hollows can make it appear like you haven't gotten a wink in weeks. Even celebs struggle with them! In a recent interview with Refinery29, Katy Perry opened up about rumors circulating regarding her getting plastic surgery. While she denies having any surgical work done, she happily admits to getting under eye filler injections to treat her dark circles. "I've done lasers and got [filler] injections under my eyes for the hollowing—which I'd recommend for everyone who wants a solution for their dark circles," she told the website.

We got the scoop from a dermatologist and plastic surgeon on whether this is a viable option for everyone.

"Filler under the eyes can do wonders for patients who have a hollow," says Dara Liotta, MD, a plastic surgeon based in New York City. It can help smooth out the under eye and plump up the skin where it's concave, she explains. That hollowness is the real problem because it creates shadow that can’t be covered with concealer. If you suffer from genetic dark circles, but lack that depth, it's easier to hide with cosmetics.

Mona Gohara, MD, associate clinical professor of dermatology at Yale School of Medicine, agrees, adding that "by subtly lifting the skin and plumping it, it reduces the darker discoloration."

So, yes, in theory fillers are a great option for those who have struggled with dark circles because of a trough under their eyes, but they're not a cure-all. Before you run out and heed Perry's advice, it's important to note that not everyone is a candidate for this treatment. "Under eye filler won't help patients with darkened, pigmented areas under the eyes, or eye puffiness alone," cautions Dr. Liotta. "in fact, it can make puffiness look worse." She recommends getting a consultation with a board-certified physician before making any decisions.

It's also important to keep in mind that this area is one of the most dangerous to get injectied. "You need to go to someone who understands the anatomy of the face," warns Dr. Gohara, such as a board-certified dermatologist or plastic surgeon. "The result of a shoddy injector who accidentally hits a vessel can lead to blindness, so proceed with caution."

Not ready to make the leap like Perry did? Dr. Gohara recommends SkinMedica TNS Illuminating Eye Cream ($92; dermstore.com) "because it contains antioxidants and growth factors that can help to prevent further discoloration." It's one of my favorites, too. I'm also a fan of Sunday Riley's newest eye cream, Auto Correct ($65; sephora.com). A good under eye cream can do wonders for dark circles, as well as fine lines and dry skin, no needles necessary.

Growing up in a society that values thinness as the ideal standard of beauty is challenging for young girls. Model and body positivity advocate Iskra Lawrence is all too familiar with this, and she's on a mission to change the way women think and feel about their bodies.

The 27-year-old model has become well-known for using her social media platform—she has 3.9 million followers on Instagram alone—to share messages of body positivity and slam unrealistic beauty standards for women. In a recent post, Lawrence shared a powerful before-and-after to talk about her experience recovering from disordered eating and how she finally found peace by embracing self-love.

By trying to look like the thin models she saw represented in magazines and on TV, Lawrence says all she found was "failure, emptiness and unhappiness" because she was trying to change who she was and living a restrictive, unhealthy lifestyle.

"I remember being proud of how skinny I looked during this shoot," Lawrence writes in the caption of the post. "And how now people call me fat when I’m just happy to be alive and grateful for this body I call my home. I used to seek approval from the fashion industry and tried to be 'perfect.'"

Lawrence credits her current happiness with her decision to focus on looking after herself by embracing self-care and nourishing her body and mind "without guilt."

"Because of what I went through [m]y dream has always been to get self-care (mental, emotional and physical wellness) education into schools," she writes. "And I’ve started that, but I also wanted to create something for adults that still needed a safe space that’s judgment free to go on a positive journey of self love and that’s why I created everyBODY with Iskra."

This new website is Lawrence's response to the many other lifestyle guides out there that tend to be geared towards losing weight. Instead, the body positive advocate wanted to create a safe, welcoming space that wouldn't be triggering for girls and women who have struggled with eating disorders.

The website includes healthy recipes (created with help from nutritionists) that avoid any mention of calories, as well as exercise tips (including workouts Lawrence herself enjoys, such as boxing, yoga, and HIIT) that emphasize getting strong and feeling good over slimming down.

"I don’t have all the answers and I’m not ever trying to change anyone or tell people to do this and that," Lawrence writes about her decision to launch the platform. "But I felt the need to create this as I wish I could have had this when I was struggling and if I’m able to use that to help even one person even better."

There’s something undeniably satisfying about leaving a fitness class dripping in sweat. When it comes to yoga, though, new research suggests there’s little reason to crank up the heat.

Bikram yoga has attracted a loyal following due to its steamy classes, which involve 26 specific postures and breathing exercises, typically performed in a room heated to about 105 degrees. Proponents swear by the style’s ability to work up a sweat and promote flexibility, and past research has shown that it’s good for your vascular health — but a small study published Thursday in Experimental Physiology suggests it’s the physical practice of Bikram, not the sweltering heat, that’s good for you.

“It’s definitely showing benefits to the 26-posture sequence,” says study author Stacy Hunter, an assistant professor in the department of health and human performance at Texas State University. “It just doesn’t seem like the heat is necessary in terms of improving heart health.”

Hunter, who is also the research director for Pure Action, a nonprofit that provides grant funding for yoga research and financed this study, says that conclusion doesn’t mean traditional Bikram isn’t healthy. Both hot and room-temperature yoga were found in the study to boost vascular health and possibly delay the progression of risk factors for heart disease and stroke. But the heat may not be responsible for those benefits.

In the study, 52 healthy but previously sedentary adults were assigned to a group: 19 people went to three hot Bikram yoga classes per week, while 14 took the exact same classes in a 73-degree room. A control group of 19 people didn’t do any yoga at all. After 12 weeks, the researchers assessed everyone’s vascular health by looking at changes in endothelial function, or the ability of blood vessels to dilate in response to increased blood flow. Both yoga groups saw changes that indicated a lower risk of heart disease, while the control group did not.

Hunter notes that the hot yoga group did see a small but statistically significant reduction in body fat percentage, compared to the room-temperature group — a surprising finding, given that past studies have shown that Bikram isn’t a particularly effective workout for weight loss. (Other research has even suggested that the high heat and humidity may raise the body’s internal temperature and heart rate to unsafe levels.)

All in all, the results should be encouraging to would-be yogis who may be intimidated by Bikram’s typically scorching temperatures, Hunter says.

“This is good news for people who might want to do it but can’t tolerate the heat or maybe want to do it at home, or for people who don’t even live near a yoga studio,” Hunter says.