Black henna can contain many things except henna. It is likely to contain indigo or other more permanent dyes and it's not safe, it can cause allergic reactions in many cases. Normal henna leaves a brownish color. I'm not sure where you are or what your means are but home hair dyes are a much better alternative.
Prior to the availability of the pure levothyroxine, desiccated animal thyroid extract was the only treatment for hypothyroidism. Today, some individuals prefer dessicated thyroid extract as a more natural thyroid hormone.
Desiccated thyroid or thyroid extract, refers to porcine or bovine thyroid glands, dried and powdered for therapeutic use. Animal extract thyroid preparations were developed in the late 19th century, and are still in use today for the treatment of hypothyroidism.esiccated thyroid or thyroid extract, refers to porcine or bovine thyroid glands, dried and powdered for therapeutic use. Animal extract thyroid preparations were developed in the late 19th century, and are still in use today for the treatment of hypothyroidism.