Hello everybody I've read about skin lightening complexion

" L-glutathione pills (normally sold in 1 bottle of 500mg L-glutathione containing 500 pills in total at a cost of about USD275-300 per bottle), most people prefer to take L-glutathione injections (400mg IV/IM). Vitamin C 1000mg IV injections are more popular for skin whitening "

Has any one use them ?
Any one has a specific regimen ?

Please help