Henna is a green powder from the leaves of Henna plant. Henna has a red dye molecule that will stain your hair red-orange. I purchase mine from mehandi shop, where Body Art Quality Henna is sold. Henna is vey conditioninig and it will relax your coils. I have found my hair to be less tangled due to using Henna. It has also thickened my hair as I naturally have thin hair.
Though I have color in my hair, It does not affect my color and I have experienced no bad efefcts from applying Henna on previously colored hair. I have decided to stop coloring my hair as I now want to retain length. I actually decided to start applying Henna again due to it's relaxing property. My hair tends to tangle a lot and Henna helps combat that problem. My hair is also usualy softer and shinier after my Henna application
Preparing Henna for my hair: I just add orange Juice till it has a yogurt like consistency. I use orange juice (pH 3.5) due to my hair being very dry. I don't use lemon juice as it has a pH of qbout 2.3, which is too acidic. I let it sit for 12 hrs before I apply it to my hair. I cover my hair with Saran wrap and a warm towel. I then let it stay in my hair overnight. Following that, I do a deep conditioner.
How often I use it: I have decided to use this once a month. It's effects last that long, besides I can only go thru the hassle of putting all that "mess" (lol) in my hair, only once a month.