Is the NIOXIN System 1 Duo suitable for all hair types?
Yes, the NIOXIN System 1 Duo is suitable for all hair types.
Can I use the NIOXIN System 1 Duo if I have a sensitive scalp?
Yes, the NIOXIN System 1 Duo is gentle and can be used by individuals with a sensitive scalp.
How often should I use the NIOXIN System 1 Duo?
For optimal results, it is recommended to use the NIOXIN System 1 Duo regularly as part of your hair care routine.