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This beauty news would cause anyone to lash out.

A young woman has issued a stark online warning against an eyelash serum she used for a year, which she says made her eyelashes fall out.

“Be careful with lash serums because ‘Oh My F – – king God’!” TikToker @lilcrackheadbih said in her video.

She said that she used GrandeLASH serum for about five months when she noticed amazing results.

Grande Cosmetics’ GrandeLASH-MD Lash Enhancing Serum ($68) includes vitamins, peptides and amino acids among its ingredients and is advertised as helping users develop longer, thicker-looking lashes in just four to six weeks — with full improvement in three months, according to a 12-week consumer study with 30 subjects.

However, the TikToker didn’t continue seeing the promised results for long.

Photos show her lashes looking long and luscious after she had been using the serum fairly consistently for a few months.

“I grew those myself,” she boasted, showing off photos of her lashes.

But after initially promising results, she was disappointed to find they didn’t last.


  She said that she used the product for five months with great success. TikTok/@lilcrackheadbih She said that she used the product for five months with great success. TikTok/@lilcrackheadbih

She claimed that after about a year of using the serum her eyelashes began to rapidly fall out.

“Just all of a sudden, within literally two weeks … what the f – – k,” she captioned another photo of her thinned eyelashes.

“I’m never gonna have these babies back.”

She eventually stopped using the popular product and switched to Lastisse, the only FDA-approved eyelash growth serum approved by the Food and Drug Administration. Its use requires a medical prescription.


  But after about a year she noticed that her eyelashes had begun to thin significantly. TikTok/@lilcrackheadbih But after about a year she noticed that her eyelashes had begun to thin significantly. TikTok/@lilcrackheadbih

The redhead said that after a year she’s still “recovering” and warned others to be careful about using this and similar products.

“For some people, it works,” she admitted, still not happy with her own results.

And she wasn’t the only one, with several commenters on the post also claiming to have lost their eyelashes after using the serum.

“NO SAME,” @jf33n replied, with over 100 people liking the comment. “MY LASHES ARE GONE.”

“THIS HAPPEN RO ME TOO,” @xotwod420 wrote.

Grande Cosmetics confirmed to The Post that: “GrandeLASH-MD has undergone 10 third-party safety & performance studies, which are viewable on our website.”

“While we can’t verify this person’s product history with GrandeLASH-MD, it’s important to note that shedding is a natural part of the lash cycle, just like the hair on your head,” a rep told The Post.

“If you stop using GrandeLASH-MD, your lashes will eventually revert to their original appearance as part of this process. Like every skincare product, proper application is important.”

The Post had reached out to the TikToker for comment.

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