Super vasmol 33 is very old and its natural.no side effects no harmfull elements.long lasting hair color.my grand mother use it and till now her hair is natural black.its easy to use.its makes hair smooth and silky.great and demanding product, always hit on market over a long period.its suitable for both male and female.i m also use it and I m fully satisfied with it.rates is also not costly.just applied on your hair keep it dry upto half hour and see the result.for best result go to sunlight and see your hair.