For most people, the first 3 months use of glutathione is crucial for it is the time where gluta is building the foundation (body chemistry re-alignment) and once built this is only the start for its whitening process. the lightening of skin is gradual (speed is depending on your metabolism and body chemical functioning) this is where you will notice that your skin is shinier and healthier than before. after this process, you will notice that your shade is lighter than before.