Can I just switch to Neofollics shampoo?

yes, you can start at any time with the Neofollics Hair Growth Stimulating shampoo. If you like to alternate the shampoo with your own shamoo (without harmful substances!) Then this is of course also possible. However, it is important to use the Neofollics Hair Growth Stimulating shampoo as described on the instructions for use for the best results.