I am using Costco brand minoxidil 5 pct foam (see pic). But during my recent visit to a doc in New Delhi (India), he recommended using minoxidil 10 pct & mentioned that 5 pct will not help hair regrow after FUE. Is that true 5 pct is ineffective and 10 pct is a better strength to use. And if 5 pct is still good, is Costco brand equally effective as Rogaine? Please share your thoughts. Thanks