Meghan Markle may officially be a Royal now, but she still keeps her beauty routine relatively low-key. She loves throwing her hair up in messy buns, isn't above doing her own makeup, and sticks to using eyelash serum for longer lashes instead of going the high-maintenance extensions route.

The Duchess also isn't opposed to sharing what products she actually uses, too. In an interview with Allure in 2014, Markle revealed that she wears by Revitalash's Advanced Eyelash Conditioner to enhance her lashes. "I also use Revitalash on my eyelashes, she told the publication. "And I swear they are as long as could ever be."

RELATED: Everything You Need to Know About Using Lash Growth Serums

As one of the OG lash serums on the market, Revitalash has a massive cult-following, which includes celebs like Markle. It's formulated with peptides, biotin, and botanicals that condition and strengthen lashes so they're stronger, less brittle, and don't break. In turn, lashes will look longer and fuller within 6 weeks of using it.

RevitaLash Advanced Eyelash Conditioner

Even though applying a lash serum is a lot quicker than using falsies and doesn't require the upkeep of extensions, many formulas hover around the $100 mark. They're not exactly cheap, so trial-and-error isn't wallet-friendly. Odds are that you might not marry into a Royal family, but you can get Duchess-approved lashes on a budget.

Revitalash usually costs $98, but until September 26, you can score a three month supply for 15 percent off by using the code "STYLE15" at checkout. Your lashes will thank you in a few weeks when you start to see its effects kick in.

Yesterday on Twitter, Dallas Cowboys offensive lineman Travis Frederick revealed that he’s been diagnosed with the autoimmune disease Guillain-Barré syndrome. The 27-year-old NFL player shared a statement detailing a weeks-long “examination and discovery process.” In the previous 48 hours, he wrote, he had undergone two treatments for the condition.

Frederick hasn’t missed a football game in the past five years, according to ESPN, but now he's facing some time off the gridiron. “My doctors have told me that it is not possible to determine a time table for a return to the field right now, but I am hopeful that I will be able to play as soon as possible,” he tweeted.

So what exactly is Guillain-Barré syndrome?

Guillain-Barré syndrome or GBS, occurs when the body mistakenly attacks its own nerves, specifically in the peripheral nervous system, which connects the brain and spinal cord to the rest of the body. This can result in a wide range of nerve-related symptoms, including tingling, pricking, or pins and needles sensations; muscle weakness; difficulty walking, speaking, chewing, or swallowing; pain; and, in severe cases, paralysis, which can become life-threatening if breathing is affected.

The worst GBS symptoms are likely to emerge within the first few days and up to four weeks after a person notices that something is wrong, according to the National Institute of Neurological Disorders and Stroke (NINDS). After that, symptoms usually stabilize, but recovery can progress slowly over a few weeks or even a few years.

Earlier this month, Frederick sought medical care for “stingers” in his neck. “I have been told that the illness was detected at a fairly early stage,” he tweeted. In general, most people don’t seek out medical attention until they’re already experiencing weakness on both sides of their body, according to the NINDS.

As with many autoimmune diseases, experts don’t fully understand what causes GBS, but it’s thought to be triggered by an infection or surgery. Campylobacter infections (a common cause of food poisoning) are thought to be the most common trigger of Guillain-Barré, according to the Mayo Clinic. The flu, Epstein-Barr virus (best known as the cause of mono), and even Zika have also been linked to GBS.

While many autoimmune conditions are more likely to strike women, men are more likely to have GBS, states the Mayo Clinic, although it can affect anyone.

RELATED: 9 Autoimmune Diseases Every Woman Needs to Know About

How is Guillain-Barré syndrome treated?

Frederick didn’t disclose details of the treatments he had this week, but Guillain-Barré syndrome is typically treated in two different ways to disrupt nerve damage.

One is plasma exchange. This procedure involves drawing blood, separating out the plasma (the liquid part), then returning the remaining blood cells to the patient…

In the market for a new fitness tracker? You're shopping at the perfect time: Fitbit just announced an update to their bestselling Charge 2 device. The Charge 3, which the company is calling their "most advanced tracker ever," is available for presale now and officially ships in a few weeks.

Preorder now: $150 and up; fitbit.com

The Fitbit Charge 3 has many of the features you've come to love about the previous Charge model: insights on heart rate, distance traveled, and calorie burn; smartphone notifications; and a sleek, durable interface. The new model is also water-resistant up to 50 meters and boasts a significantly larger touchscreen (it's about 40% bigger, but 20% lighter, thanks to aerospace grade aluminum). If you have an older Fitbit, you might also notice that the Charge 3 feels more like a smartphone; you can easily swipe between apps, and the backlit display automatically adjusts to different types of light.

But our senior fitness editor Rozalynn S. Frazier is probably most excited about the better-than-ever battery life. "A single charge should last you seven days, which is a game changer—especially for someone like me, who always seems to forget to plug in my device at night," she says.

Also cool, according to Roz? The ability to easily swap out bands. The Charge 3 offers three different types: silicone sports bands in four cheery hues for $30, woven bands in two colors for $35, and midnight blue or plum leather bands for $50. The different textures make taking your fitness tracker from a workout class to dinner and drinks totally seamless.