For most people, it takes a few weeks of daily usage of Revitive before they start to feel the benefit. Some people start to see an improvement after only a few days, for others it may take 6-8 weeks, especially if they have been suffering for many years. Everyone's different and that's why, when you buy directly (either from the call center or from this website) we include a 60-day (8 weeks) trial period, so everyone has the chance to feel the Revitive benefit.