Last week I got an email from a lovely reader who wanted to know if there is any natural way she can turn her grey hair back to black? Henna application only gives reddish brown or burgundy color, but she wants to know if it is possible to get black hair? Luckily I have an answer to the question – Indus Valley Indigo Powder . This is a 100% natural Indigo powder which can be used alone or along with Henna. It is affordable & easily available. Let me walk you through what is an Indigo powder and how to get the desired results using this power. What Is Indigo…