"Sulfates, parabens and silicones in shampoos are silent killers of hair follicles," Angelina Jolie's stylist Lina Vandersanden told Vogue.
Instead of chemicals, the stars switched to rye flour, as they did in medieval Europe.
A study in the Journal of Cosmetic Science (2023) confirmed that rye enzymes restore the keratin layer of hair, and the absorbent properties of flour remove dirt without aggressive surfactants.

Hollywood Secrets
Brad Pitt uses a mask made from avocado and dark beer: “It gives volume and shine, like after a salon lamination.”
Lady Gaga washes her hair with a decoction of nettle and rosemary: "After the tour, my hair was falling out in clumps. Now it's thicker than when I was 20!"
Recipe for "Medieval Shampoo"
Mix 3 tablespoons of rye flour with 200 ml of warm water, apply to the roots, massage and rinse. For shine, add 1 teaspoon of apple cider vinegar.
Real results
Mark, 35, cured seborrhea in 2 months. He claims that pharmaceuticals only made the situation worse, while rye saved him from baldness.
Victoria, 28, claims that after using rye masks, her hair stopped splitting, despite dyeing it.
Experts' opinion
Trichologist John Frank warns that flour can clog drains, so he recommends not forgetting to use conditioner.
And not long ago it became known that MIT scientists have developed a shampoo based on microbial proteins that regenerates follicles.
The development has already been called a breakthrough solution in the fight against baldness.