Henna

Henna is a best conditioner. If you use it regularly will straighten your hair.

How to make henna.
Boil teapowder to get blackish solution. Mix henna with this water to make thick paste. Add 2 tspoon coffee powder,one tspoon lemon juice to this.
Some people add curd or egg white also.Keep it for one whole night. Some beauticians make this solution in iron pans or put one iron nail in it to get iron directly in henna preparation.( I don't know it works or not.)
Warm little coconut oil and apply it on hair.then apply henna preparation. wait for one or more hours then wash it off with using herbal shampoo.