Photo: Cardi B Instagram, People

Cardi B has access to the best hair stylists and hair care products, but even she knows that sometimes the simplest hack can be the best hack. On Friday, she shared on Instagram her trick to beautiful, shiny hair and it may surprise you.

She captioned her post with “My last 2 washes I been boiling onions and using the water to wash my hair. I used to do this 6 years ago when I started my healthy hair growth journey. I stopped cause I got really lazy.Its odorless and I notice that it’s been giving a shine to my hair.”

People Magazine shared that 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,” according to Healthline.

Cardi B is not he only one with an interesting hair care hack. Model Suki Waterhouse uses Coca Cola as a hair rinse for a beachy look while Blake Lively uses mayonnaise as a hair mask.