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From cortisol face to sexy water: are TikTok diet trends actually worth your time?

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Written byLiz Connor

ro-huntriss

Reviewed byRo Huntriss

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Social media creators are making all sorts of unverified health claims online. So who’s opinions can you actually trust?

Summary

1Can oatzempic help me to lose weight?

By now, you’ve probably already heard of the controversial diabetes medication Ozempic being used off-label as a weight loss aid...

2Will ‘sexy’ water improve my focus?

The term ‘sexy water’ was coined by TikTok creator Kelly Stranick back in 2023, and it’s all about adding...

3Is cortisol face the reason I look puffy?

Ever woken up with a puffy face and rounded jaw that can’t be explained by a bad hangover or a restless...

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Whether you love it or loathe it, one thing is clear: the TikTok algorithm can be a serious breeding ground for health misinformation.

To help you sort the fact from the fad, we asked Ro Huntriss (@dietitianro), a qualified dietitian, to weigh in on some of TikTok's most popular trends. Here’s what she had to say…

Can oatzempic help me to lose weight?

By now, you’ve probably already heard of the controversial diabetes medication Ozempic being used off-label as a weight loss aid.

Well, now social media has a new buzzword: ‘oatzempic’ – an aptly named diet drink made by blending oats, water and a dash of lime juice into a viral sludge. Many users claim that drinking this homemade concoction daily can help you to shed unwanted pounds.

So is it actually true? “There is some method to the madness here,” says Ro. “As oats contain a soluble fibre called beta-glucan, the theory is that they work in a similar way to semaglutide mediations in that they help us to feel fuller for longer, so we’re less likely to consume additional calories through snacking throughout the day.”
Delicious Healthy breakfast or snack. Yogurt with berry black currant, oat flakes and mint in glass on white wooden table background.
However, if you’re thinking about hopping on the oaty bandwagon, there’s a big caveat to know. “While oats can potentially support weight loss by promoting satiety, and there’s nothing specifically harmful in the oatzempic recipe as such, they need to form part of a wider balanced diet,” Ro advises. That means eating a good spread of healthy fats, protein and carbohydrates.
“My big concern with oatzempic is that people might take an ‘all or nothing’ restrictive approach and substitute entire meals with drinks, which we know isn’t a sustainable or healthy way to lose weight.”

Will ‘sexy’ water improve my focus?

The term ‘sexy water’ was coined by TikTok creator Kelly Stranick back in 2023, and it’s all about adding functional mix-ins to plain water to make it less boring.

Wellness enthusiasts have massively embraced the trend, with thousands sharing their own takes on sexy water – mixing in everything from fruits and veggies like lemon and cucumber to trendy health powders like chlorophyll, collagen and adaptogenic mushrooms into their H2O.

So should we be doing the same? “The main benefit of sexy water is that it helps increase your hydration, mostly by adding flavour and novelty,” says Ro. “As for the nutritional value of infusing water with herbs or vegetables, only tiny amounts of nutrients or antioxidants will actually leach into the drink, unless you’re actually eating those garnishes afterwards.”

That said, if you’re not a fan of plain water’s bland taste, Ro reckons that adding a little sweetness can encourage you to drink more throughout the day, which is important for your overall health. As you probably already know, staying hydrated can reduce headaches, improve organ function and generally keep you feeling your best.

Things get more interesting when it comes to nootropics. “It’s definitely a growing field of science, and there is emerging evidence that functional mushrooms like Lion's Mane could help improve cognitive focus. Similarly, there’s some research to suggest that collagen can support skin health and elasticity,” Ro explains.
Detox drink. Infused water with pear, lime and sage. Refreshing summer homemade cocktail. Fresh healthy cold beverage.
“So, if people feel they’re experiencing health benefits, they could absolutely include these things in their diet. But it’s important to do your research: some supplements have safe upper limits, and even if all the ingredients you're chucking into your sexy water are safe on their own, they could interact with each other or other meds in your routine, so it's not risk-free.”

Is cortisol face the reason I look puffy?

Ever woken up with a puffy face and rounded jaw that can’t be explained by a bad hangover or a restless night’s sleep? TikTok might have you believing it's something called ‘cortisol face.’

This made-up term refers to a puffy or bloated facial appearance that some users believe is caused by extra levels of the stress hormone cortisol coursing through the body.

But can lengthy traffic jams and high-pressure deadlines really change our face shape? “Not exactly,” says Ro. “There is a medical condition called Cushing’s Syndrome1 that can cause facial puffiness when people over produce cortisol, but if we’re zooming out to the entire population, it’s incredibly rare.” To put it into context, incidence rates range between 1.8 and 3.2 cases2 per million people.

“For most people, it’s unlikely that stress alone would cause facial swelling, but that’s not to dismiss your experience of a puffy face," says Ro. “A bit of facial swelling is common, but it can easily happen if our diet is high in salt or if we’re dehydrated – so there could be lots of other reasons it’s regularly happening to you.”

Can beer baths give me glowing skin?

Soaking in a tub of lager might not sound like the most relaxing way to spend a Sunday afternoon, but beer baths are all the rage right now, with some people claiming the ‘soothing’ properties of malt and hops offer benefits to our skin.
macro soft drink texture,Close up view of the ice cubes in dark cola background. Texture of cooling sweet summer's drink with foam and macro bubbles
“Take this trend with a big pinch of salt, because beer baths feel very gimmicky to me,” warns Ro.

“Beer contains ingredients like yeast, barley and hops, which in theory can contain some antioxidants and B vitamins, but there’s no scientific evidence to suggest that sitting in beer has any real benefits for your health,” she says. “And remember, beer also contains alcohol, which might actually irritate some people’s skin.”
Some of the most persuasive videos on beer baths claim it can help ‘detox’ the body, but Ro says this term should always be a major red flag when you're scrolling online: “It's one of the most faddy wellness buzzwords out there.”

If you’re looking to build better skin, Dr Ro suggests focusing on your diet, rather than sudsing up in a boozy bath. “As protein is the building block of everything in our body, eating enough can naturally support skin regeneration. Make sure you’re also getting a good dose of antioxidants from a variety of colourful fruits and vegetables, which can help to fight off oxidative stress that can damage the skin.”

One final tip? “Swap the beer for water,” says Ro. “Staying hydrated is one of the best and most accessible ways you can support your skin in the long-run. It might not be sexy, but I’m a big believer that wellness doesn’t need to cost a fortune.”

What’s next?

Looking for more myths debunked? Check out 9 mushroom myths busted or find out if you really need to put magnesium on your feet.

Disclaimer

The advice in this article is for information only and should not replace medical care. Please check with your GP or healthcare professional before trying any supplements, treatments or remedies. Food supplements must not be used as a substitute for a varied and balanced diet and a healthy lifestyle.
 

Sources

  1. NHS. Cushing’s syndrome [Internet]. nhs.uk. 2021. Available from: https://www.nhs.uk/conditions/Cushings-syndrome/‌
  2. Hakami OA, Ahmed S, Karavitaki N. Epidemiology and mortality of Cushing’s syndrome. Best Practice & Research Clinical Endocrinology & Metabolism. 2021 Jan;35(1):101521.
 

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