The sooner you start using Vigro® 3 Step System, once hair loss or thinning hair has been identified, the quicker the results will be. However, Vigro® 3 Step System has been known to be effective in cases where hair loss has been left unchecked for many years. As long as the hair root is still intact, it is possible to reactivate hair growth. Vigro® is not indicated for hereditary or genetic hair loss.