I used some Doo Gro Shampoo and condioner before and it didn't do my hair any justice...my hair wasn't soft and was kind of hair to detangle.
I didn't like it.
I have also used the grease...the Medicated vitalizer for thinning edges...it was blue.
That aint work.
Then I bought the Original Light formula Grease with Vitamins A, D and E (or something like that). It was an orange grease and I liked that, but I don't use it on a regular basis. Just whenever I am in PJ mode. It is my stash of hair products and when it runs out I won't buy it again.
I have also used the Stimulating Growth Oil.
No growth was stimulated.
It was also too watery for my hair.
I don't like Doo Gro products. Not because they didn't "gro" my hair, but because my hair just doesn't use these products well. Not all products work well for everyone. And like CincySweetie said, I don't believe any product can grow hair but a clean scalp, keeping ends fresh and maintaining moisture will help retain length...therefore growth.
Good luck