Year after year, celebrities are the first to flock to try out the latest health craze. From Karlie Kloss's boxing routine to Selena Gomez's love for ginger shots, Hollywood loves experimenting with the latest and hottest trends in the wellness world.

As we head into another new year, which will no doubt introduce more "cool" ways to work out and more super healthy foods to devour, we thought it was a good time to round up the most popular celeb-tested trends that truly work and those that don’t.

Karlie Kloss's boxing workout

For the past few years boxing has been the workout of champions in Hollywood, particularly among female celebrities. Karlie Kloss, along with her fellow supermodel friends, including Bella and Gigi Hadid, credit boxing for their toned bodies. They're not the only ones. Actresses Mandy Moore and Gabrielle Union also praise the sport for helping them to release stress and get in shape.

There's a good reason why. Boxing is one of the most intense cardiovascular activities for athletes of many different fitness levels by providing high-intensity, calorie-burning routines that helps strengthen your arms, legs, and core.

Verdict: Find a local boxing gym because it's here to stay.

Selena Gomez's ginger shots

Singer Selena Gomez once revealed to James Corden that she likes to kick off her mornings with a ginger shot. Likewise, both Kylie and Kendall Jenner say they're fans of the elixir zinger, especially when they're feeling under the weather.

There's good reason. Ginger boasts anti-inflammatory and antioxidant compounds, which helps support healthy digestion and immunity. It also helps rev up your metabolism, giving you that much-needed morning boost.

Verdict: Get your shot glass and take a swig of this good stuff in 2022.

Kim Kardashian’s charcoal habit

One of the hottest wellness trends is charcoal. From putting it on your teeth to your face to your body, celebs are crazy for charcoal. Kim Kardashian West is so obsessed with it that she reportedly keeps charcoal lemonade stocked in her fridge. Though charcoal might help with your complexion, there's one place you should not be putting it: in your body.

Charcoal supposedly absorbs toxins and removes impurities in your body, but experts say there's been no scientific proof of that, and besides, we have a liver for detoxification. In fact, charcoal will also absorb other substances in your gut, both good and bad, and if you're taking medication it can hinder its absorption. It's also known to cause constipation and/or diarrhea.

Verdict: Skip eating the dark stuff, and leave charcoal for your Sunday mask routine.

Hailey Baldwin's craze for cryotherapy

Supermodel Hailey Baldwin claims her favourite beauty treatment is cryotherapy. She's not alone. From Demi Moore to Lindsay Lohan, celebs are fascinated with getting frozen.

In short, cryotherapy involves being placed in a subzero tank (200-300 degrees Fahrenheit) for about three minutes to help improve skin tone, cellulite, as well as sleep, depression, and injuries.

However, there's not a lot of scientifically-backed research to support its claims. In fact, a 2015 scientific review concluded that cryotherapy doesn’t assist with post-exercise recovery or muscle soreness, the two benefits that made the practice so popular in the first place.

Verdict: You don't need to freeze your assets.

Kate Hudson’s love for celery juice

This is another famous “detox” drink. Kate Hudson swears by this and we do love celery. It’s crunchy and apparently it has a good source of natural fibre; it can be very refreshing in the summertime with this heat! She recommends drinking it first thing in the morning to “detox the system”. Usually a little bit of lemon juice or maybe even a little bit of Cayenne pepper is thrown in.

Verdict: If you enjoy drinking lawn, this is your way to wake up.

Miranda Kerr’s oil pulling practice

Miranda Kerr is a former Victoria's Secret Angel and top model. With her hectic travelling schedule, Kerr is willing to try anything to stay healthy. In addition to exercise and a strict diet, she begins every day with oil-pulling, an ancient Ayurvedic dental technique. "I do oil-pulling with coconut oil," Kerr told a publication, outlining her morning routine. "I put a tablespoon of coconut oil in my mouth. I swish it around for a good 20 minutes – you're not allowed to swallow." This action supposedly draws out toxins in your body to improve oral health, and is said to help fight gingivitis, plaque, and bad breath. It's also thought to boost overall wellness.

Verdict: Well, why not.