What's the best natural way to lighten red hair that has been bleached and turned red as a result?

Some people use lemon juice, but in my opinion it doesn't take that much out. You should try purple shampoo. a good brand is shimmering lights. Purple shampoo is just like a regular shampoo but takes out the harsh undertones of orange or red. This is usually what people use after they bleach their hair. It will not take out completely all the undertones but it will help.

I dont know, maybe go with the red, but take out the brassiness with a blue shampoo...?I would go to a salon ...... they can correct it.;)