
You can't go 24 hours these days without seeing another miracle jab or life-changing pill being advertised for everyone to see on social media.
It seems as if everyone is a self-qualified health expert on the internet nowadays, and advice can vary from helpful to downright dangerous.
We've even seen some TikTok content creators banned recently due to their advertisements of 'weight-loss' drugs such as Ozempic and Mounjaro, while nearly every gym bro online will try and convince you that eating steak and eggs for every meal is the way to go (spoiler alert: it isn't).
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Now, the latest viral trend appears to focus around a US medicine after a number of celebrities admitting to using it as a way of boosting their brain power, in a way that's been compared to the 2011 film Limitless... although you're unlikely to become super-rich and learn Mandarin just from taking methylene blue.

What is methylene blue?
It's rarely good when something is used as both a dye and a medication, but that's the case with methylene blue.
Nowadays, it is mainly used to treat methemoglobinemia, but has previously been used for cyanide poisoning and urinary tract infections in the past, so it's certainly versatile.
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But now wellness influencers, and the likes of Joe Rogan, are suggesting that it could be one of the ‘best kept secrets in biohacking’ and can be a ‘game changer for mental clarity and longevity’.
What are the benefits?
One user on TikTok has been sharing information about the drug, including some of the shocking benefits that he's personally experienced.
Speaking on one video, user @Trevstrends said: "People have been using it for focus, clarity and drive. Even motivation. I tried it and my brain just clicked."
In another video, he adds: "My brain has never felt sharper. I hated how it kept me awake at night, until my productivity doubled. I wanted a quick fix, now I'm accidentally disciplined."
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Meanwhile, Bryan Johnson, a millionaire biohacker who is determined to never die and compares erections with his son, has also endorsed the drug, so if that doesn't convince you then I don't know what will.

What are the experts' warnings?
There are also numerous risks to taking methylene blue, with neuroscientist Anne-Sophie Fluri telling the MailOnline: “Without solid evidence in humans, these claims are at best speculative and at worst potentially dangerous.
"The brain is not a machine you can casually 'optimise' like a smartphone."
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Apart from turning your tongue and pee blue, the drug can also lead to more serious complications such as confusion, agitation, muscle twitching, seizures, sweating, shivering and diarrhoea.
So, if you want to boost your brains safely, maybe stick to the sudoku.