Which one Best 100% working without side effect...

Types of skin whitening injections :
there is many agents and substance that can lead to skin whitening and mainly they effect the milanin synthesis  ( the substance in body which cause the skin color and its grading )  , and i will mention some of it :
1. glutathione ( most popular and most safe )
2. hydroquinone 
3. alpha hydroce acids 
What is the cost of glutathione injections ?
one glutathione injection may cost around 200 -400 $ . but whole body treatment may cost around 2000 - 3000 $ depends on the center that provides the service
Benefits of skin whitening injections :
1. will effect the whole body and change skin color without different 
2. mostly works as anti-aging agents 
3. raise up your self confidience 
Risks of using skin whitening injections :
1. may effect the melanin substance that exist in hair or lips 
2. lack of melanin substance could lead to increase skin infection and disease because melanin substance have some defence role in skin system
3. whitening effect will stop directly after stopping using the injections 
General advices :
1. you better not use those kind of products , and if so , you must visit well reputiated cosmatics center and stick to your doctor advice 
2. drink plenty of water 
3. use the external herbal products without execcive use 
4. using skin care and sun-block products routinly