This is the chemistry lab you can eat. Baking soda is a mild abrasive. It gently scrubs color particles off the hair shaft.
Crush up three Vitamin C tablets into powder. Mix them with a tablespoon of baking soda and a little shampoo. Apply it like a paste.
Leave it on for 30 minutes. You’ll feel like a mad scientist. Rinse it out and watch the color fade by a shade or two.
The Sun Is Your Sidekick
Sunlight is nature’s bleach. It literally breaks down pigment molecules. This is why jeans fade when you hang them outside.
Sit in the sun for 20 minutes after washing your hair. The UV rays will zap color like a tiny superhero ray. Bonus: you get free vitamin D.
Don’t lie in the sun for hours—unless you want your hair to look like toasted hay. Ten to fifteen minutes is plenty.
How To Fade Hair Dye Quickly