“Making use of onions to the scalp is a really well-described technique for treating hair for a few years. Some say it causes hair loss, some say it cures hair loss,” says Farjo. “What it does do is trigger irritant results on the scalp and subsequently irritation, which in flip causes a brief enhance of blood circulate. It’s well-known that irritation of the scalp could cause non permanent hair development due to this.”
There’s little analysis on the query, however a small 2002 study of a group of people with a sort of hair loss often known as alopecia areata discovered that those that utilized onion juice to their hair noticed extra hair development than a management group that utilized plain faucet water.
However, Farjo cautions that overuse of onion on hair can lead to dryness, pores and skin injury, and even eczema, which might imply the reverse impact: hair loss as a consequence of breakage. So far as shine goes, she has by no means encountered any scientific proof to assist Cardi B’s declare however concedes that the onion’s sulfur—the identical chemical aspect that may make you cry when chopping them—may probably have a smoothing impact on hair.
“The sulfur bonds that hyperlink hair fibers might be broken in day-to-day weathering so probably sulfur compounds in onions can restore these bonds which might make the hair look smoother and subsequently probably shinier,” says Farjo.
Hair graying, in the meantime, is attributed to the shortage of the catalase enzyme in pigment cells of the hair. Onions do comprise catalase, however in response to Farjo, pigment cells in hair lie beneath the pores and skin’s floor at a degree that can not be penetrated by onion juice, and subsequently couldn’t flip again the clock on graying hair.
Farjo additionally warns towards getting too caught up within the thought of pure cures.
“The concept of utilizing a “pure” substance for the hair or scalp is commonly promoted,” she says. “Nonetheless, pure merchandise are made up of chemical substances—some good and a few unhealthy. Keep in mind that overuse of something might be unhealthy.”
So there you could have it. Subsequent time you see a pic of Cardi B, say “Targets!” however verify the details earlier than you attempt movie star magnificence hacks.