Conditioner made from mayonnaise and egg yolk
If the hair is very brittle, dry and strawy (due to a lot of dyeing or tinting), you can mix a hair cure with mayonnaise 80% and egg yolk.
Approximately Mix 1/2 cup mayonnaise and 1 egg yolk (more depending on hair length) and massage into dry hair. Wrap with cling film and leave for about half an hour. If possible, wash with or without a little shampoo. Helped me great, better than the 10 hair treatments that I bought.
Is a tip from my grandma and has helped many.