During one of Zoya's Flash Promo's. I received this Qtica Natural Nail Growth Stimulator. On the back, it says in 14 days you should see up to a 1/4 inch growth in your nails.
To test it, I started by filing my nails down to nubbins. :(
Then I applied it every 2-3 days when I changed my polish (as it instructed) as a base coat.
And I did not file or cut my nails AT ALL.
Here are my nails on day 14....
I honestly feel like my nails would have grown this length by themselves over 14 days, but I am not sure. I suppose I should do a control test some other day...
But when used regularly I am sure this would be great! Just remember that it only helps length, no other nail problems like peeling.