Sounds crazy to me, but her hair does look great! Here's the thing, Cardi isn't wrong about this one.
According to Headline, adding onion to a haircare routine may be beneficial due to "the anti-inflammatory and antimicrobial properties" of the vegetable which can "help you grow your hair or enhance its healthy appearance,"
"Onion juice has the potential to help stimulate hair follicles and thereby encourage hair growth," Tiffany Young, a certified trichologist and the CEO of ThinHairThick, told Martha Stewart in March. "It is also a natural antiseptic. Hair loss that is caused from inflammatory disease, poor blood flow, and poor diet could see a benefit."
One commentator said, "I have to try boiling the onions .. I was juicing them and left it too long .. & for an entire year, anytime my hair was blowed out or straightened it smelled like Sofrito."
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